After recently moving into our home, we contacted Koster to come by and bring our system up for spring/summer after being winterized for the previous owners. They came by and realized our system had been damaged from another contractor doing some other underground work. They made all the necessary repairs very quickly and professionally. While on site, I asked if they could look at a small problem with our outdoor lighting…they were happy to make repairs and and at a very reasonable charge. This was my first experience working with the Koster team and I was very impressed!

Used Koster Irrigation in a large commercial setting for ball field and landscape irrigation. Their team coupled with the most advanced products is top-notch and can get the job done. Their service after the fact is beyond what you would expect from others. Can not complain about one thing! The one product I have at my facility that never gives me a problem. 10/10!!!

The service from Koster Irrigation has been excellent!They are professional and prompt with skilled and friendly technicians. After many years of sports equipment in my yard (regulation soccer goal, 8 and 10 foot basketball goals, a baseball field) I now have grass and lovely flower beds! ( I do miss all the boys and their friends!)

I had them redo the irrigation lines down one section of the property line where a new fence punctuated the mainline. They found a few more leaks in the process where pipe joints had cracked over the years. They found them all and did a great job repairing things. I also had them to create a couple of new zones. They did good work and kept at it, no sitting around with this crew.

When we purchased our home, the irrigation system was already installed. We called Koster Irrigation to inspect our system. Will Koster immediately responded, inspected the system and explained what needed to be done to bring it on line. Everyone from the folks in the office to the technicians who maintain the system have always been responsive, friendly and thorough. I highly recommend the folks at Koster Irrigation for your irrigation needs!

I have always been able to rely on Koster Irrigation to maintain and or repair my irrigation system. Not only did they take care of the system here, but they recommended another company for an area they did not service. I would definitely recommend Koster Irrigation.

Koster Irrigation comes out every year to our senior apartment complex and services our sprinkler irrigation. They are spot on with keeping up with what needs to be done. Have used this company for 10 years and am very happy with their service.

I had a recent incident where another company caused damage to my irrigation system. Will and his team helped get the issued resolved and were very helpful with information to share with the company that did the damage pointing out where it was and the probable cause. Not only was my system fixed quickly and running better than ever but I was able to get the damage covered by the other company. I really appreciate the patience and great work I received from Koster Irrigation.

Koster services our irrigation system. They are prompt and attentive to our needs. I highly recommend their services!

Koster Irrigation was recommended to us by another company to check our backflusher system. They performed the work promptly.

In 2012 and again in 2018 we had Koster put in lawn irrigation systems, first in our front yard and later in our back yard. The work was done quickly and professionally and has made all the difference in our ability to keep grass growing in our heavily shaded yard. In 2019 we had one sprinkler go bad, and Koster quickly dispatched a worker to do the repair. Just recently, when we had a water line issue in the yard, Koster was quickly able to show the plumbers where the irrigation lines were located so that they could do their job without any damage to the irrigation lines. We have been pleased with all his work.

Great service and very timely. Thank you for your wonderful work!

Very professional irrigation service and landscape lighting. Always super quick to respond for service and the problem is always fixed. Top notch company.

Will Koster and his team were exceptional.They were .professional.. organized and timely. Will Koster was very responsive to phone calls and questions. We had our irrigation system installed in month of February. In spite of the weather the job was completed on the date promised. We were totally satisfied with their work. We highly recommend this company.

Wills crowd is top notch. We had a commercial sized system that was running off a pond that we would no longer have access to after a planned development. Koster was able to get us tapped into the city and re-route our lines while coming in below the original bid price.

Koster Irrigation was very professional and very efficient in completing our irrigation system repair. I would definitely recommend them to anyone in the area needing help with an irrigation system.

I can always count on koster. Their technicians are awesome.

Installed my system and did such a good job you hardly noticed that an extensive system had been installed. Great job and maintenance was timely and always done to satisfaction. Great company to do business with. Highly recommend.

Have had assistance from Koster Irrigation on a variety of residential and commercial projects. They are consistently timely, knowledgeable, and professional. They have the proven ability to troubleshoot complex problems and execute effective solutions. My highest recommendation.

Contacted Koster irrigation about starting up a system at a newly purchased home. They were very responsive, fixed a few minor issues at a fair price. Would recommend to anyone looking for a professional irrigation company.

Koster Irrigation currently services a commercial retail shopping center that my company owns and manages in Wilson, NC. The technician, Will Koster is very responsive and knowledgeable. Repairs are completed in a timely manner and he is very professional. Will continue to use this company for future needs!

Koster Irrigation have handed all of my pressure test need for all of my propertys over the last 10 or 12 years. Always on time and no complaints. Great company!

Will Koster and his team are the best in the business. Always professional and the job is always completed to customers expectations. If youre looking an irrigation company, look no further.

I used Koster for the installation of my irrigation system I am very happy I did! Very professional, courteous and job was finished on time I would highly recommend Koster Irrigation

I highly recommend Will Koster and his company. They are very professional and responsive when needed. Great people to work with.

So why advertise when you cant even return phine calls poor business

I highly recommended Koster Irrigation for any irrigation and landscape lighting needs. I have dealt with company for many years and they have always meet or exceeded my expectations.

I have used Koster for years to test my backflow device on my sprinkler system and they always are timely in servicing and very polite and courteous. They are first rate! I would recomend them for any yard maintenane project

Local company that was easy to work with!

Koster Irrigation offers truly knowledgeable, high quality, support and service. Their recent installation of sprinkler tap back flow hardware and associated piping was truly excellent, no leaks! Very courteous, professional business, and work crew that took very good care of our yard during installation. All the green grass is back where it was! Truly outstanding!

Called Koster Irrigation left message. Called back the same day . Called a few days later and came down and repaired my lawn irrigation sprinkler system. It was done in a timely manner by a person that was knowledgeable, professional, and done in a timely manner. He made sure we were satisfied with the work and the system was working properly to our satisfaction. We would not hesitate to have them back again if we needed their services in the future.

Koster Irrigation just finished our yard and they did a fantastic job. Will personally took the time to show me all the different zones and how to program them to come on daily. I highly recommend them for your irrigation needs!

Koster Irrigation has been very professional and timely in all the work they have done for me. I would highly recommend them to others.

Very professional and affordable.

Great response time and terrific work! Could not have been better!

I would definitely recommend Will to anyone who wants to put in an irrigation system. He is easy to work with, more than fair and they do a good job. I have not had a chance to use my system because it was just installed but I have no doubt that if there are any problems he will take care of them promptly. He is very responsive to phone calls or emails and that is so rare but greatly appreciated. I chose him because of his good reviews and they are well deserved.

Koster irrigation recently installed or irrigation system in Raleigh. Will is detail oriented and a great communicator. His guys are professional, punctual and did a great job. I highly recommend Will and his crew. We are also planning to use him for landscape lighting.

Will and his team have been fantastic to work with in getting our older irrigation system up to speed. I was especially impressed with how he communicated with me during their busy season. I highly recommend them!

Will Koster and his crew are great, always very professional and do a great job. Will is easy to reach in case of emergency (which I have had a couple) and always quick to respond. Highly recommend their services.

Will and his team are the best. Very straightforward, high quality workmanship, and no hidden gotchas with this group. One company quoted me a price for a project, and Will’s team did it for less. When I asked him why he was lower, he told me that he just didn’t believe in adding on services that weren’t necessary just to make a buck. Very rare that you find honesty like this in business.

In 2001, I was new to the Wilson area and totally unfamiliar with sprinkler systems. To my good fortune, after interviewing several companies, I chose Koster Irrigation. For more than sixteen years, Koster Irrigation has provided superb professional services. No problem is too small and is handled promptly by staff who are respectful and courteous. I highly recommend Koster Irrigation. [Many thanks to Mr. Will Koster.]

I recommend this company to everyone. Excellent service. Very neat about their clean-up after they finished. Affordable prices and really helpful teaching me how to use my irrigation. 10 stars. Thanks

Cant say enough good things about Will Koster and his crew with Koster Irrigation. They were prompt, professional, and left my yard better than they found it. The job on my property was not easy and the system works flawlessly. We even had some issues with my existing irrigation system and they came back to fix it. Looking forward to a healthy lawn this spring and summer.

Koster Irrigation installed 36 back flows for our apartment community. It was done very professionally and each year they assist with re-inspections and reporting information required to the city. They are very professional and easy to work with.

I recommend Koster for all irrigation and landscape lighting installations and service. The entire team is knowledgable, professional, and reliable. They are easy to contact, quick to respond, upfront with pricing, and a pleasure to work with.

I have been very pleased with the service that Will and his employees have given us! They were right on time and were very responsive to all of my request. Good service at a fair price can not be beat!!

We have used Koster Irrigation for 21 years and have always been impressed by Will Koster and his crew. They have always been on time and given great service when needed. Cant say enough good things about their work. Highly recommend.

Koster Irrigation did a great job at a reasonable cost with the installation of my irrigation system. The work was neat and the sod replaced when ditches filled in. Mr Koster thoroughly explained the system controls to me in an easy-to-understand way. He was available to answer questions when I had them.

Ive had work done on my sprinkler system and replaced the control system. Koster Irrigation completed the work in a very timely and professional manner. The owner talked with me personally about different options and was very patient and knowledgeable. The employees explained everything they were going to do and explained everything they did after the work was completed. Great team. Extremely impressed and highly recommended.

Will can out gave me a price, when I called for them to come and install the system they did just that. That was important to me because of the difficulty in getting a company to show up and do they agreed to do. They did excellent work and everything is working great. I didnt mind paying for something that works. I would recommend this company.

Will and his company have helped redesign or repair systems at two different residences for me. The work is always well explained, neat and on time. They are very quick to respond and it’s nice to know you can call them and trust the work.

Great people to work with! They did a fantastic job on two different projects for me. Would highly recommend! -Graham Knott

I would highly recommend Will to anyone. I had no experience with an irrigation system before moving into new home last year. He has been very responsive with every question Ive had. No issues with any of the work that has been provided.

Will has maintained my system for 15+ years. His team is reliable, efficient and thorough. Spring start-ups, repairs, and winter shutdowns are always on schedule. I highly recommend Will for your irrigation needs.

Highly recommend Will and his crew at Koster Irrigation. They have done quality work for me in fixing and maintaining our existing irrigation system. Plan to continue working with this great company!

Have had great quality and fast service with Koster Irrigation. They have very experienced employees. They get the job done right the first time. Very nice to deal with also. They always respond in a timely manner.

I had a great experience with Koster. They put in a 16 zone system for us with minimal disruption to the the yard. They had a plan and their execution was flawless. Their service since the installation has been “spot on”!

Will did a great job on our landscape lighting. We need more light at our driveway, but did not want it to be too commercial. Will suggested accent lights on trees and driveway entry lighting. He arrived as scheduled and completed the job in budget and on time.

I called Koster Irrigation to startup the system this Spring. Will came out to look at the property that day as he was in the area. He said they would be able to check everything out and make necessary adjustments the next week and they did just that. Later I decided I wanted to change a couple of irrigation heads and they came out quickly to do that also. The guys are professional, polite and show up to do what is discussed. I have been very pleased with the work and response from this company.

Will Koster and his team did a fantastic job on our outdoor lighting project. The staff was very friendly and reliable. We would recommend Koster Irrigation to anyone.

I contacted Koster Irrigation at the end of May 2019 to repair the control panel on my irrigation system. It was a week that repeated saw temperatures in the upper 90s. The owner retasked a team to work my request into the work day. Further, the owner contacted me directly to see whether there was something that could be checked and corrected on the control panel ahead of his team arriving. The workers expediently fixed the control panel and then walked through each zone to ensure all heads were working properly.I was very satisfied with the work.

Crew did a great job! Mr. Koster was very informative and helpful. I would recommend them to anyone.

Koster Irrigation was recommended to me by my landscaper when we were completely redoing my front and back yard. He told me that if I wanted my irrigation done right that Will is the one to call. Needless to say he was right. Will and his crew came out and worked with me and the landscaper to get a setup that was perfect for my yard. His guys had to remove the existing irrigation that was installed before I moved into the house that was poorly done. The install of the new irrigation was done with attention to detail and quality parts. It has been over 3 years since the install and I have yet to have to do any repairs to the system. For another example of how they impressed me even 2 years after install of the new system. I had natural gas lines installed in my yard and needed to mark the irrigation lines. I send an email to Will asking him if he remembered where the lines were. Not only did he get back to me within a 24 hour period he sent me a copy of the original landscaping design with the lines marked and zones colored in different colors. I have recommended Will to everyone I know that needs irrigation system install and repair. I know I will be using him for all my irrigation needs in the future.

They do it all! I have had them doing my irrigation needs for more than 15 years and there is nobody I trust more than them! You will not be disappointed in there service.

Excellent job repairing and updating my irrigation system. Wills crew was very professional and did an outstanding job of troubleshooting and correcting problems that existed with the old setup. I would highly recommend Koster irrigation.

Will Koster is a straight shooter. I got three estimates for installing an in-ground irrigation system in my front yard. Wills estimate was on the high side, but he was the only contractor who told me the truth about everything I asked.One of the other contractors gave me a cost estimate for a certain component that was easily shown to be false by a quick internet search. Another contractor told me that Raleigh code required a set spacing between certain components of the system. I didnt like the answer, so I checked the Raleigh code. The other contractor was just plain wrong. The brazen misrepresentations of the other contractors were just astounding to me. Do they really think that people are not going to independently check these matters for an expensive home improvement project like a sprinkler system?Anyway, in addition to being honest, Will communicated well about status and projected timelines. His crew worked hard under a broiling sun to finish the project on time. That is something I especially appreciate since, at my age, I am no longer able to do that.In my opinion, it will be hard to find a contractor for your home irrigation system project better than Koster Irrigation.

Will Koster and his team did an amazing job with the install of our irrigation system. A combination of yard and flower bed heads were installed and our yard is looking great. Easy instructions to make changes to the system plus the winter blowout are all services that have been done very much to our satisfaction now two years in. 5 stars!

Whenever we call, they are quick to respond to our needs. Highly recommend them for any irrigation issues you have. Nice People!!!!

I switched to Koster Irrigation after encountering delays and high costs with another firm. Will and his team are great to interact with - on line, on the phone or in person. They are prompt to get you on the schedule and pricing is cost effective. We had several leaks to resolve and they were very helpful in diagnosing these difficult-to-find problems. They were able to schedule back flow valve inspections quickly when competitors wanted to schedule me a month or more out. I plan to use Koster again in the future.

Will Koster is the best! He installed our irrigation system 20 years ago and is always fast, polite, and responsive. It’s a pleasure doing business with a local businessman.

Koster Irrigation installed a system in my yard approximately 15 years ago. I have been so pleased with the quality of their work and especially with their maintenance service and responsiveness over the years.

Will came out and met with me about repairing our irrigation system and explained exactly what would happen. A couple of days later his crew came out and took care of fixing it.Will also gave me great referrals for a couple of other services that I needed and did not know who to turn to in the Wilson area.

Absolutely the best!!!! Professional & expert concerning all of my irrigation needs. They even took the time to explain small details. I wouldn’t hesitate to call them again!!!

Its a shame you try to do business with a company with good reviews and call, speak to the the owner. He tells you to put it in a email and send it to him. You follow his instructions. He emails back and says hell get back to you in a few days. You wait a week, two weeks, three weeks, four weeks. Give up on him and do the job yourself. Why are people in business and treat customers like this. Im thru with Will and Koster Irrigation Inc as well.

Will and his staff have done an excellent job with our irrigation system, from backflow valve inspections, sprinkler valves replacing. Very professional and fast service.

Will has always been there for us. He is prompt, reasonably priced and always courteous. We know anyone that uses him will be pleased with his service.

Will Koster is a pro! I had an issue recently with my irrigation system after it had been de-winterized. He helped me solve the issue over the phone, thus helping to avoid a service all to the house. Was very creative in asking for photos/videos of certain aspects of the irrigation system and then coming back with suggestions / advice on how to troubleshoot. Ultimately, with his guidance, the problem was solved! In face to face interactions, Will and his team have always been on time, professional and very client focused. Highly recommend Koster Irrigation!

I have lived in Raleigh since 2011 and every November since then has been a panic to find someone who would show up when they commit and winterize our sprinkler system. My new lawn professional recommended Will Koster as a reliable resource (at which I chuckled). I spoke to Will and made an apt with low/no expectations hed show or show as committed. He was on time, made some recommendations for spring, winterized, and certified the back flow for the city of Raleigh. Although I was willing to pay what it took for a reliable and repeatable service, his charges were exactly what I had paid for prior poor service. He is professional, transparent, and no BS. Just what I needed.

Will and his folks are timely, courteous, professional and do a great job. Only once or twice over several years have I had any issue with them and each time he will insure it is fixed to my satisfaction. Great business.

Ive looked for an irrigation contractor all summer and finally found a top notch company. Will and his team at Koster irrigation did a great job on the install. Was very prompt when I asked to come out and quote. Was very clean and organized with the job. They started on a Tuesday and finished the following Monday, due to one of the employees being sick. However they made up for the slower days by coming back on a Saturday to get the job done before the rain came in. After install was complete, Will came back and gave a tutorial on the Rainbird system. Awesome system by the way as I can operate via Wifi. Ive only had the system for a week, but all seems to be working just fine! Would definitely recommend to anyone looking for an irrigation install.

Will and his group installed a new system as part of our rebuild in 2013. They proactively maintain the system as well--winterizing and prepping for spring. Great service. Great system. Reasonable price.

Responsive, on time, professional and honest are how I describe Will Koster and his team at Koster Irrigation. My grass is green and my landscape lights are perfect thanks to their expertise.

This company is very professional and does a really great job! We here at Cottages at Glendale are so glad to have this company on our team! Thanks for a job always well done. Terry Horne Property Manager Wilson, NC 27893

By far the best irrigation company I have worked with. Will Koster and his staff are highly skilled and I recommend to anyone.

We have been using Koster Irrigation for many years to maintain our home system. They have always taken care of the system with minimal activity from us other than our appreciation.Fast and reasonable for quotes and stayed on schedule through completion when work was done.

We have been working with Koster Irrigation since 2014. They installed our irrigation system and recently helped us with a landscape lighting install. Will and his team have always been accessible, kind and professional and their work is excellent. Cant recommend them enough!

Will Koster is accessible, responsive and good at what he does. So nice to have a dependable provider that can be counted on to perform.

We have used Koster for years for our backflow testing. Very quick and has taken care of us.

Will Koster is professional and responsive. He has serviced my sprinkler system since 2015 and weve always been happy with his work.

Excellent service, responsive to customers needs, fair price. Highly recommend.

We had a big issue with our irrigation system at Sonic Drive in that a couple other people could not figure out. Then someone Recommended that I contact Will. This was the best thing I did he was confident he would fix the issues. He was busy with a few other things but did come by and check it out, he was good at keeping in touch so I knew he was still working on it. He found several problems including cut wires under the concrete. Now we will be able to use our system again after it had been down for 3 years. Thanks Will Koster I would recommend them!

We have used Koster Irrigation for many years. Their work is professional and excellent. We have contracted them to handle our HOA irrigation and our system has been worry free for years. Highly recommend Koster Irrigation, Inc.

Excellent service (fast, high quality, RELIABLE!) by knowledgable, good people! Call them - they’ll answer!

We have used Koster Irrigation for several years to service, maintain and repair our residential irrigation system. We have found them to be very capable, responsive, and pleasant to deal with. We are completely satisfied with the services they have provided and highly recommend them.

I have use their services for more than 13 years. I highly recommend Will and his company.

Will has built a great reputation for providing great service at affordable pricing, my long experience with lawn care folks is the bigger the company, the harder it is to reach the top person to get something done, not so with Will, he always answers his calls and the work is done promptly. Highly recommended!

Fantastic experience year after year. Will and his crew service my sprinkler system at least twice per year and are always professional and reaponsive. If you have irrigation or landscape lighting needs, do yourself a favor and call Koster Irrigation.

WE RECENTLY PURCHASED A HOME THAT HAS A IRRIGATION SYSTEM. AS A HOMEOWNER THAT HAS NEVER HAD A IRRIGATION SYSTEM, I WAS CLUELESS ABOUT HOW TO OPERATE IT. I CALLED KOSTER IRRIGATION AND TOLD MR. WILL MY SITUATION. HE TOLD ME HE WOULD BE OUT WHEN EVER I WANTED HIM TO COME & GO OVER THE SYSTEM WITH ME SO I WOULD KNOW HOW TO OPERATE IT. IRRIGATION 101, IS WHAT I NEEDED. WHEN WILL GOT HERE THAT SAME MORNING, HE TURNED ON MY SYSTEM, I ASKED HIM TO LOOK AT THE MAIN WATER LINE BY THE ROAD.THE SYSTEM HAD NOT BEEN MAINTAINED PROPERLY, THEN I ASK WILL TO GO THRU THE ENTIRE SYSTEM AND CHECK IT OUT FOR US. WITHIN A FEW DAYS A QUALIFIEDTECHNICIAN WAS AT OUR HOME. ALL OF OUR PROBLEMS WERE CORRECTED & OUR SYSTEM IS WORKING GREAT. I CALLED WILL BACK TO GET THE RAIN BIRD WI-FI CONTROLLER AND WE LOVE IT. TOP NOTCH LOCAL COMPANY, COURTEOUS & PROFESSIONAL STAFF, WE WOULDNT CALL ANYONE ELSE FOR OUR IRRIGATION NEEDS.THANK YOU TO WILL & YOUR AWESOME STAFF.

I have used Will Koster and Koster Irrigation since its inception and have never been disappointed....the business is very professional and knowledgable about all of your irrigating needs....they are responsive to your requests and needs and always clean up nicely after every job....also Will informs you on new and advanced systems as they become available....he will guide even the most technically challenged on how to use the system....I would not look any further if you need irrigation in your home or business

Weve been using Koster Irrigation since we had our backyard overhauled, and they have served us very well since. Timely and communicative, and does the job correctly the first time.