DS Cornerstone Builders Corp.

DS Cornerstone Builders Corp. Contact information, map and directions, contact form, opening hours, services, ratings, photos, videos and announcements from DS Cornerstone Builders Corp., Construction Company, 400 Ostrander Avenue, Riverhead, NY.

“Trusted Craftsmanship, Built to Last”
East End of Long Island
Established 2017
General Contractor
All Phases of Carpentry & Construction
Hardwood, Vinyl and Tile Flooring
Design Services
Construction Management
6313810040

Swipe for before and after ✔️
02/21/2026

Swipe for before and after ✔️

Church ProjectComing to a close on our full bathroom renovation > stay tuned for before and after pictures🔨
02/18/2026

Church Project

Coming to a close on our full bathroom renovation > stay tuned for before and after pictures🔨

Bayberry [shed] Project complete.From design to build ✔️
02/17/2026

Bayberry [shed] Project complete.

From design to build ✔️

02/16/2026

West Branch renovation officially underway.
It’s humbling to look back at where we started — just a small team with big goals — and now be trusted with projects like this.
Still the same hands-on crew. Still learning. Still growing.
Grateful for every opportunity and everyone who’s believed in us along the way.
One step at a time. 🔨

From Start to Finish-Demo, Frame, Sheath, Side and Roof on this second story addition.Raising a ridge and creating a hig...
12/12/2025

From Start to Finish-
Demo, Frame, Sheath, Side and Roof on this second story addition.

Raising a ridge and creating a higher roof line can gain valuable space in existing attic spaces such as this. Keeping the roof lines makes a clean tie in from existing to new.

Thanks to:





We handle all phases of construction from new construction, additions to interior and exterior renovations.

Before, During and After 🔨🪚👀Quick and Clean Bathroom Renovation Floor, Wainscot and Shower Stall DemoVinyl Floor install...
09/19/2025

Before, During and After 🔨🪚👀

Quick and Clean Bathroom Renovation

Floor, Wainscot and Shower Stall Demo

Vinyl Floor install, Shiplap Wainscoting, Window Swap, Slantfin, Vanity, All New Plumbing Fixtures and a Custom Shower for the finishing touch.

(Finish Painting by Owner)

New fresh look ✔️
07/30/2025

New fresh look ✔️

inquire about our custom shed’s
07/04/2025

inquire about our custom shed’s

Thank you for finishing up this renovation 🇺🇸
05/24/2025

Thank you for finishing up this renovation 🇺🇸

From this to that 🌿Full bathroom renovation
04/01/2025

From this to that 🌿

Full bathroom renovation

Handmade Terracotta Glazed
01/31/2025

Handmade Terracotta Glazed

Address

400 Ostrander Avenue
Riverhead, NY
11901

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+16317226090

Website

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