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Top-Rated Foundation repair specialists in Sag Harbor - Updated Nov 2026

Avatar for Foundation Crack Repair, LLC
Foundation Crack Repair, LLC
4.5(
17
)
Concrete Foundation - Repair

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Im am so happy with the work that was done on my house. Tyler came and gave a very fair estimate on lifting my concrete side entrance stairs to my basement. He explained every step of the process and did exactly what we wanted with no issues. Everything was done to perfection. No damage was done and you cant even tell the stairs ever needed a repair in the first place. I would highly recommend this company and would hire again for any future jobs."
Foundation Repair Ex.
Basement Repair Project
Response time2 days
Response rate99%
19 neighbors recently requested a quote
Avatar for Lorenzo Napolitano Construction Inc.
Lorenzo Napolitano Construction Inc.
4.9(
17
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 1994

Free estimates

Customers say: True professional

"Lorenzo did a great job. All his guys were very attentive. Everything was done right on schedule. All the work was perfect. He did a great job installing my foundation, Belgium block driveway and major regrading of the property. I would hire him again in a heart beat."
Patio
Concrete pool coping
Patio
Patio finished
Patio finished

+72

Response time7 hrs
Response rate86%
2 neighbors recently requested a quote
Avatar for PRIORITY CESSPOOL SEWER & DRAIN, INC
PRIORITY CESSPOOL SEWER & DRAIN, INC
4.8(
270
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 1991

Free estimates

Emergency services offered

"Had a backup a few days before and wanted to determine if it was a simple clog or cesspool related. They sent out a tech (Jimmy) the same day. He located both cesspools and walked me through my options. He was honest and patient, answering all my questions along the way."
Additional Photos
Response time8 hrs
Response rate100%
Recommended by96%of homeowners
Avatar for Twin Fork Waterproofing, LLC
Twin Fork Waterproofing, LLC
4.2(
29
)
Concrete Foundation - Repair

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"Just excellent start to finish - I’ve been battling water in my basement for years and finally have no more anxiety during a heavy rainstorm. The new humidifier and waterproofed basement was money well spent - and the work and care from this top notch team was outstanding. Highly recommend them. Quality work at a fair price."
Basement Remediation
Duct Cleaning
Projects
Projects
Projects

+3

Response time11 hrs
9 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for New York Waterproofing
New York Waterproofing
4.3(
28
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"Excellent: Assessment of problem. Proposal to fix the problem. Cost. Applying the solution (work quality, materials, time). Value. Affability."
Stopping Ocean Water's Hydrostatic Pressure
Foundation Crack From Shrinkage
250 Year Old House Water Entering Brick Foundation
Hydrostatic Water Permanently Sealed
The Hamilton

+12

Response time10 hrs
Response rate93%
7 neighbors recently requested a quote
Avatar for M.O.E. Masonry, Inc.
M.O.E. Masonry, Inc.
5.0(
1
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 1996

Free estimates

"As a General Contractor, we rely heavily on sub-contractors to accomplish our homeowner project objectives. M.O.E. Masonry has and continues to be a first rate partner in our business and we're delighted with their quality of work, craftsmanship and reliability!"
Hampton Hardscapes
Hampton Hardscapes
Hampton Hardscapes
Hampton Hardscapes
Hampton Hardscapes

+20

Response time1 day
Avatar for Sebonac Creek Landscape
Sebonac Creek Landscape
4.6(
9
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"We are in the middle of repairing our lawn which was destroyed by grubs and moles. Max has been treating and seeding it. It is looking better each day. He hasn't finished, but I have no doubt that it will be wonderful when he's done."
Response time7 hrs
Response rate93%
5 neighbors recently requested a quote
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