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Find Basement remodelers in Greenport

Avatar for Agate & Co. Builders
Agate & Co. Builders
5.0(
13
)

Angi Approved

In business since 1990

Free estimates

Customers say: Quick response

"Jim and his crew went over and above our expectations. They did a beautiful job on our new deck. When completed, they cleaned up and carted away all scraps. A truly professional job by all."
17 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Exterior Team Home Services, Inc.
Exterior Team Home Services, Inc.
5.0(
22
)

Angi Approved

In business since 2016

Free estimates

Warranties offered

"Ronald and his Team did an excellent job for a very good price. Very professional. Pointed out some things that needed attention and then took care of it. The workmanship and customer service is better than any other craftman I have ever hired. I will keep Exterior Team Home Service number available to recommend to anyone that asks if "I know someone who...." I trust Exterior Team Home and will use them in the future."
1 neighbors recently requested a quote
Recommended by95%of homeowners
MGT Construction, Corp.
4.3(
15
)

Angi Approved

Free estimates

Emergency services offered

Warranties offered

"The shower in my master bathroom had a leak behind the wall and needed to be fixed. I didn't want a total redo or a "one day" fix. After interviewing other contractors I chose Steven Kaplan. He understood what I wanted and expected. The shower leak caused unseen rot behind the wall and into the tub deck. John, Steven's (carpenter) turned a minus into a plus by repairing the damage and adding a shower bench. Steven's crew John and Mario were clean, neat and respectful of my home. They preform quality, professional work at a reasonable cost."
9 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Northgate Home Improvement Corp.
Northgate Home Improvement Corp.
5.0(
82
)

Angi Approved

In business since 1985

Free estimates

Warranties offered

"I have had Jeff and his guys renovate my ranch house in Melville. He has done 2 bathrooms, my basement and my kitchen. He has always been reliable and done great work. The house looks like new. He quickly corrects any problems and is always in touch. He and his guys are friendly and neat. His estimates are reasonable. I strongly recommend Northgate Home Improvement."
14 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for JBL HOME IMPROVEMENTS INC
JBL HOME IMPROVEMENTS INC
4.9(
227
)

Angi Approved

Super Service Award Winner

In business since 2006

Free estimates

Warranties offered

"Dave strive for excellence in all his work projects. He and his crew are professional, always show up to the job on-time and his work meets and surpassed our expectations. His price is not the cheapest but if you want a good quality job, look no further."
33 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Good to Go Maintenance Inc
Good to Go Maintenance Inc
5.0(
9
)

Angi Approved

In business since 1983

Free estimates

Emergency services offered

Good to Go Maintenance Inc has been in business for 45 years offering general construction, Repairs, and Renovation. We are insured, licensed and offer a detailed timeline with each project.\n\nWe are also Roofing specialists (GAF certified roofing contractors) offering the "System Plus" lifetime material and labor warranty. (Free with every complete roof replacement).\n\n

16 neighbors recently requested a quote
Recommended by100%of homeowners
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FAQs for basement remodeling projects in Greenport, 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 Greenport, NY homeowners’ guide to basement remodelings

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