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VanderKoos Construction

About us

Van Der Koos Construction, Inc. is a builder and general contractor specializing in the construction of super energy-efficient homes coupled with renewable energy technologies (photovoltaic, solar thermal and geothermal) to produce buildings approaching zero fossil fuel consumption and zero carbon footprints. We are a NYSERDA-approved installer. The 20-year-old company is licensed in Westchester and Putnam Counties, and operates in Westchester, Putnam, Dutchess and Orange Counties in New York State and in Fairfield County, Connecticut.

Business highlights

36 years of experience

Services we offer

Custom homes and additions, energy efficient technologies and renewable energy systems (solar photovoltaic, renovation and remodeling, solar thermal and geothermal).

Amenities

Free Estimates

Yes

Reviews
5.06 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
100%
4
0%
3
0%
2
0%
1
0%
Showing 1-6 of 6 reviews
Shelley L.
Dec 2014
5.0
Yes, I recommend this pro
$45,000
Since the insurance company gave us a low reimbursement for Hurricane Sandy, we had a very tight budget.  But the builder was able to propose cheaper solutions to at least get such a large-scale project done in time to get us through the winter.  Also, the roof has insulated well so far this winter so we definitely feel a lot warmer inside this year.

Nancy T.
Jul 2014
5.0
Yes, I recommend this pro
$300,000
When I hired Ralph Koos, I didn't fully realize then what a great decision it was. I was living 2 hours away and only visited the site once a week, usually for 2-3 hours. Ralph needed me to make the thousands of decisions required in building a house. I never had to supervise to ensure the work was getting done on schedule, to sufficient quality. Now that I've lived in the house 2 1/2 years, I bless Ralph for the quality of the workmanship of the house. The few small things that have cropped up - adjusting a few doors, and the ceiling vent fan, Ralph came and cheerfully, professional did at no charge. (His insistence). I wish I were building another house, and I'd happily use him again.

Nancy T.
Jan 2013
5.0
Yes, I recommend this pro
$255,000
See above.

Nancy T.
Jan 2012
5.0
Yes, I recommend this pro
$305,000
Ralph Koos is a true pleasure to work with. This is the first house I built, and I put myself into great hands by hiring
Van Der Koos Construction. Ralph's intelligence, knowledge, experience, competency, commitment, and attention to detail are exceptional. He has a great network of sub-contractors who match his quality of delivery, and he co-ordinated them flawlessly. I lived 2 hours away, and visited the job site only once a week. Ralph ran the project so well that surprises and stress were very few. He was always available to me (although I only called him during business hours), and extremely responsive to my requests and concerns. Unfailingly polite and patient. He stayed within budget, and was very fair in charges for change orders. He was very generous in going well beyond the call of duty, and helping me settle into the new house and get over the few new house bumps I encountered. Other than bad weather obstacles, he stayed right on schedule. The finished house is a masterpiece, well exceeding my hopes. I highly recommend using Van Der Koos Construction, and would definitely use them again.

Lygeri K.
Feb 2011
5.0
Yes, I recommend this pro
$10,000
Van der Koos Construction had built my house in 1999 and when i was shopping around for a contractor to install a solar hot water system i was surprised to learn that they had gotten into renewable energy. They had done such a great job on the house that I decided to take a chance on them. I'm glad I did -- no problems at all. The work was done for the agreed-upon price without any extras. The workers were courteous and cleaned up after themselves. The company took care of all required permits, and even advised my accountant about the relevant tax credits (Note: federal and state tax credits knocked 50% off the price of the system, so that it cost me only $5000.) At the end, the building inspector commented that it was a "really nice job." All i know is, it works. And my oil usage has gone down significantly.

Lygeri K.
Jan 2011
5.0
Yes, I recommend this pro
$300,000
I had established a deadline of Sept. 1, so that my children would be able to start the year in their new schools. The work was completed on time and on budget, with no hidden extras. All of my questions and concerns were addressed in a straightforward and pleasantly professional manner. The workmanship and final product was and continues to be excellent. (In case you are wondering, we took out a construction loan to pay for the job, which was converted into a mortgage with the same bank upon getting our certificate of occupancy). I have since hired VanderKoos Construction for two other major projects: building a three-level wraparound deck with a built-in spa, and installing a solar thermal hot water system. Again, two excellent jobs. I am filing separate reports on each.

Licensing

State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our Find Licensing Requirements page.

*Contact business to see additional licenses.

FAQ

VanderKoos Construction is currently rated 5.0 overall out of 5.

Yes, VanderKoos Construction offers free project estimates.

No, VanderKoos Construction does not offer eco-friendly accreditations.

No, VanderKoos Construction does not offer a senior discount.

No, VanderKoos Construction does not offer emergency services.

No, VanderKoos Construction does not offer warranties.