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Find Basement remodelers in Sag Harbor

Avatar for Greg Home Improvement, Inc.
Greg Home Improvement, Inc.
4.8(
80
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 1997

Free estimates

Warranties offered

"They replaced my bathtub, installed a new vanity, put in new lights and painted a wall cabinet. Not only were they punctual, but very polite and reasonable. I highly recommend them and will use them in the future."
LIVING/DINING/KITCHEN IN PROGRESS
LIVING/DINING/KITCHEN IN PROGRESS
LIVING/DINING/KITCHEN IN PROGRESS
LIVING/DINING/KITCHEN IN PROGRESS
LIVING/DINING/KITCHEN IN PROGRESS

+101

Recommended by96%of homeowners
Avatar for Alta Renovations Corp
Alta Renovations Corp
5.0(
25
)

Serving Sag Harbor, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"Jose and his team were the best team I have ever had work on a job in my house. Jose went WAY above and beyond to make sure we had our basement back in order in a timely fashion. He was willing to work after hours if needed to help get our finished basement back after we had suffered a sewage leak and had to wait until mitigation was complete. A 3-4 day job was complete in 2 days! And one of his workers, Carlos, from the second day stuck around to help me get the heavy and large items back into the basement. There was a previous review that said Jose was very emphatic to their needs and that is so true. That review actual was what made me give Jose a call. I wish there was a word better than highly recommend. Thank you Jose and your entire team!"
Additional Photos
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Additional Photos
Additional Photos
Additional Photos

+26

Response time8 hrs
7 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for AR Home Construction LLC
AR Home Construction LLC
5.0(
29
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

A.R. Home Construction is a premier design and build construction company specializing in luxury new home construction and high-end remodeling projects. With expertise in all aspects of construction, from conceptual design to final touches, A.R. Home Construction delivers exquisite and luxurious transformations. Our team of skilled professionals is dedicated to exceeding client expectations and creating stunning spaces that reflect unparalleled craftsmanship. Explore luxury and sophistication at our home design showroom, offering a curated selection of top -quality products for your project.

My jobs
My jobs
My jobs
My jobs
My jobs

+73

1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Loja Renovations Fine Carpentry LLC
Loja Renovations Fine Carpentry LLC
5.0(
22
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 2024

Free estimates

Small jobs welcome

"⭐⭐⭐⭐⭐ We couldn’t be happier with the work Manuel did on our house. He covered everything the renovation required- tile work, plastering, plumbing, electric, carpentry. The tile work is absolutely flawless, the baseboards were installed with great attention to detail, and the plastering on the ceilings came out smooth and professional. Everything was done with care, precision, and a clear pride in craftsmanship. He was reliable, punctual, and kept the work area clean throughout the project. Communication was excellent, and he made sure everything was done exactly the way we wanted. The house looks completely transformed, and the quality of work exceeded our expectations. Highly recommend to anyone looking for a skilled, trustworthy handyman. We will definitely be using him again for future projects!"
Bathroom
Bathroom
Bathroom
Bathroom
Bathroom

+5

Response time1 day
Avatar for Refined Renovators & Design
Refined Renovators & Design
5.0(
8
)

Serving Sag Harbor, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"Basement looks great , better then we ever expected .. the workers were on time and very respectful.. I would definitely recommend .. we will be using this company in the future for our next remodel."
comfortable spaces
sunroom
Beautiful Bathroom
Primary Bedroom
custom cabinets

+8

Response time5 hrs
Response rate93%
18 neighbors recently requested a quote
Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
5.0(
12
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 1986

Free estimates

Customers say: Quick response

"There are not many people in today’s world that really cares about how they are perceived . A true craftsmen is honorable and able to listen. Quality and precise precision make every job memorable . Arthur takes pride in everything he does. You could not find a better construction company , run with complete honesty and quality work. Doesn’t forget his patience and caring for what his customer wants. Hire this amazing company…you will not regret it. Your satisfaction gives him joy in his craftsmanship ?"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response time2 days
5 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Premier Home Remodeling & Design
Premier Home Remodeling & Design
4.5(
21
)

Serving Sag Harbor, NY and surrounding areas

Approved

In business since 2019

Free estimates

Small jobs welcome

"Premier home remodeling did a amazing job on a big renovation we had done on our home. We had our unfinished basement, kitchen and 2 bathrooms remodeled. Charles and the crew were professional, clean, and super friendly. They had great suggestions, and designed our kitchen a way me and my husband never thought could be done. Our bathrooms are beautiful, and our basement is a great new living space to our home. We will definitely use them again and will be recommending them to all of our family and friends. Thank you premier!"
custom niche
vanity and tops
vanity and tops
cabinets
mirror

+53

Response time2 days
Response rate87%
7 neighbors recently requested a quote
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FAQs for basement remodeling projects in Sag Harbor, NY

Finishing a basement turns unused square footage into livable space and returns up to 70% of what you spend when you sell your home. Beyond that resale boost, you gain a playroom, home office, or guest suite you can start enjoying right away. That mix of daily comfort and solid return on investment (ROI) makes basement finishing one of the smartest upgrades you can tackle.

In some parts of the country—especially lots on swamps, high water tables, or other wetlands—local codes prohibit basements. Saturated soil puts constant pressure on foundation walls and lets water seep in faster than any sump pump can handle. 

If your property sits on waterlogged ground, building on a slab or crawl space is often safer, more affordable, and code-compliant.

Most basements wrap up in four to eight weeks. Framing takes three to five days, with electrical and plumbing rough-ins following over the next week. Add five days for drywall, two to three for flooring, and another week for paint, trim, and punch-list items. 

Delays can happen if materials run late or your contractor’s calendar is packed, so build in a little cushion when you plan.

Whether a finished basement counts toward your home’s official square footage depends on local rules. Many areas only include below-grade space if it has code-approved egress, fully finished walls, ceilings, and floors, plus consistent heating. 

Check with your local assessor or building department before you start; meeting those standards can affect taxes, appraisals, and resale value.

Building codes require a checklist: dedicated heat and electrical service, a code-approved stairway, and at least one egress window or exterior door. Walls, ceilings, and floors must be fully finished and meet insulation, ventilation, and fire-separation standards. If you add a bedroom, you’ll also need a closet, proper clearances, and safe exits. If you change the layout later, be ready to update the space so every new room still meets today’s code.

The Sag Harbor, NY homeowners’ guide to basement remodelings

From average costs to expert advice, get all the answers you need to get your job done.