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KOS Building Group, LLC logo

KOS Building Group, LLC

5.0(
15
)
Find a Custom Home Builder,

About us

KOSL Building has been developing high-end homes throughout Westchester County, NY and Greenwich, CT for over 35 years. Focusing on premium locations and quality craftsmanship, KOSL facilitates a seamless new construction package from start to finish. Our turnkey services involve property acquisitions, designing plans, land-use approvals, financing solutions and construction management, resulting in a streamlined process. Renowned for our extensive expertise and exceptional service, KOSL has been distinguished through various awards as the top residential builder in Westchester, NY for several years without plateau. Having developed over 200 high-quality homes, our experience and customer service has continued to flourish permitting us to accommodate any client’s needs. Contact us today to get started on your dream home!

Business highlights

Se habla espanol
35 years of experience

Services we offer

Custom Home Building, Property Development

Amenities

Free Estimates

Yes

Warranties

Yes

Reviews
5.015 Reviews
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Number of StarsImage of DistributionNumber of Ratings
5
100%
4
0%
3
0%
2
0%
1
0%
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Filter reviews by service

Showing 1-15 of 15 reviews
Jessica C.
May 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
$6,000,000
They were dependable with quick solutions and we couldnâ t be happier. Weâ d recommend them to anyone looking to buy a custom home - we never want to leave our house!
Andrew G.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
$8,250,000
KOSL made a very stressful process much easier and tailored our beautiful new home to perfection. Would highly recommend.
Brittany H.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
KOSL was recommend to me by a family friend and Iâ m so thankful they did. They made the building process incredibly simple and we couldnâ t be happier with our result. They explained each step of the process throughly, and kept us in the loop the entire time. Id recommend them for others looking to build a custom home.
Franny M.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
Working with this company was an absolute joy! Highly professional and the best value around.
Zachary A.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
$8,500,000
KOSL are absolute professionals. They built a custom home for me and my wife and we could not be happier.
Kaile P.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
When it comes to high standards and performance, KOSL is second to none. They did an incredible job with our home!
Gisselle L.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
$5,750,000
Great company. Very professional and knowledgeable in their work. Would highly recommend them for anyone looking to build their dream home.
Ryan M.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
$4,000,000
Amazing builders to work with. Receptive to all of our requested changes, even though some were very challenging to meet. I would recommend to anyone.
Nicholas L.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
$6,500,000
Amazing work done by amazing people. We are extremely satisfied with our home! They worked closely with us every step of the way and paid close attention to every little detail throughout the construction. Itâ s a family run business and you can really see their passion for what they do!
Gabe S.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
$6,500,000
After searching for a credible and quality builder for awhile, we are glad to have found KOSL Building. They helped us find the perfect property in Scarsdale and built the home we always wanted. Anything we needed, they were always there without hesitation. We have recommended them to all our family and friends!
Kai L.
Apr 2023
5.0
Yes, I recommend this pro
KOSL is a rare find: a family owned developer who DEEPLY cares about the quality of their work and the satisfaction of their customers. I wouldnâ t hire anyone else to build a home.
Evan C.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
KOSL are the most prestigious and professional builders I have ever worked with and would highly recommend them.
Rob B.
Apr 2023
5.0
Find a Custom Home Builder
Yes, I recommend this pro
Incredibly professional and an absolute pleasure to work with. 10/10 recommend going to them for your new home.
Joseph C.
Apr 2023
5.0
Yes, I recommend this pro
KOSL is an outstanding company that is family owned and operated with a reputation for honesty, reliability and extreme professionalism. Their custom luxury developments are unparalleled, receiving awards for their incredible designs. Each home is meticulously crafted with the finest and state of the art elements, resulting in breathtaking stunning results that are sure to leave a lasting impression. Their exceptional attention to detail and commitment to perfection makes KOSL a true master of their craft, leaving each homeowner in awe of their remarkable work.
Patrick G.
Apr 2023
5.0
Yes, I recommend this pro
Highly Recommend KOSL for any of your building or architecture needs.

Licensing

Licensed*

Trade License Number

NHC.0009386

Trade License Locale

NY

Trade License Expiration

03/31/2026

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

KOS Building Group, LLC is currently rated 5.0 overall out of 5.

Monday: 8:00 AM - 6:00 PM Tuesday: 8:00 AM - 6:00 PM Wednesday: 8:00 AM - 6:00 PM Thursday: 8:00 AM - 6:00 PM Friday: 8:00 AM - 6:00 PM Saturday: Closed Sunday: Closed

Yes, KOS Building Group, LLC offers free project estimates.

No, KOS Building Group, LLC does not offer eco-friendly accreditations.

No, KOS Building Group, LLC does not offer a senior discount.

No, KOS Building Group, LLC does not offer emergency services.

Yes, KOS Building Group, LLC offers warranties.