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Top-Rated Basement remodelers in Nassau - Updated Nov 2026

Regeneration Contracting, LTD
4.6(
20
)
Basement - Remodel

Serving Nassau, NY and surrounding areas

Approved

In business since 2015

Free estimates

Customers say: Quality work

"Shawn was very knowledgeable and very professional. The bathroom remodel was the master bathroom that was small so only one person could work on it but it was done within a week. He was able to keep everything neat and contained and the finished product looks great! The cost was also very reasonable and at the low end of what we had expected to pay."
Cabin
Kitchen and Cabinets
Bathrooms
Decks and Steps
Bathroom

+96

Response time1 day
14 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Pro Services
Pro Services
4.8(
150
)
Basement - Remodel

Serving Nassau, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"Every step of the way was above expectations. Scheduling was easy, I was notified of ETA, and Al, our technician, was prompt and thorough. We needed our gas fireplace cleaned, and the job was done thoroughly, carefully, and efficiently. Our 25+ year old fireplace now functions perfectly and looks amazing. Can’t beat the price. 10/10 recommend."
Chimney Cap Installation
Smoke chamber before
Chimney Sweep Project
Fireplaces Project
Chimney Sweep Project

+36

Response time4 days
Response rate100%
47 neighbors recently requested a quote
Avatar for Artie's Home Maintenance and Property Services
Artie's Home Maintenance and Property Services
4.5(
42
)
Basement - Remodel

Serving Nassau, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Emergency services offered

"From the moment we connected with Artie, we knew he was the contractor for us. You can count on him to show up or call when he is expected to and do great work with exceptional attention to detail. Artie takes the time to answer questions, understand your needs and provide you with the outcome you hope for. He started with a complete kitchen remodel, making suggestions that created a more beautiful space than we had imagined, and since then, we have hired him for several other projects. He is a great guy, easy to communicate with, offers fair pricing and handles unexpected situations that arise professionally, offering solutions that keep the job running smoothly. We only wish that we had found him sooner, we could have saved ourselves some difficult experiences with other contractors. I would not hesitate to contact him in the future for all our home improvement needs...big and small!"
Response time8 hrs
3 neighbors recently requested a quote
Recommended by74%of homeowners
Avatar for OC Construction
OC Construction
5.0(
7
)
Basement - Remodel

Serving Nassau, NY and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"OC Construction did an outstanding job remodeling my kitchen! The new tile backsplash completely transformed the space and looks absolutely beautiful. Their craftsmanship and attention to detail were excellent, and everything was installed perfectly. The crew was professional, punctual, and respectful of my home throughout the entire project. They finished the work on time, communicated well, and exceeded my expectations. I couldn't be happier with the results and would highly recommend OC Construction for any kitchen remodeling project!"
Exterior stone wall
Exterior stone wall
Exterior stone wall
Bathroom tile
Bathroom tile

+64

7 neighbors recently requested a quote
Bowen Ridge Construction
4.6(
9
)
Basement - Remodel

Serving Nassau, NY and surrounding areas

Approved

In business since 2016

Free estimates

Warranties offered

"As someone building a second home in Vt., everything needed to be done from a 235 mile distance. This can feel a little scary. My experience w/ Joe was Outstanding!!! Joe approaches all his tasks whether it be contract work or time & material work w/ the same set of ethics. Get it done in a timely fashion, be fair, communicate clearly, take regular pics, send via text for approval or comment, & offer advice through his experience as a seasoned builder. If you are lucky enough to work w/ Joe, enjoy the experience, your in good hands. Bill Giglio from Ct."
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+106

1 neighbors recently requested a quote
Recommended by100%of homeowners
Evolution Power and Development
4.8(
26
)
Basement - Remodel

Serving Nassau, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Offers commercial services

Customers say: Quick response

"Jesse did a great job installing the under cabinet lighting I got my wife as a present. He installed the new LED under kitchen cabinet lights which included installtion of the low voltage transformer/converter and light switch/dimmer. His experience was evident with his selection of dimmer switch location and optimum running of wiring to cover both sides of the kitchen cabinets."
Response time9 hrs
Response rate97%
15 neighbors recently requested a quote
Ross Contracting Corporation
4.6(
13
)
Basement - Remodel

Serving Nassau, NY and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"I would recommend Ross Contracting for all your home remodeling needs as well as new projects you would like to have done at your residence. They were thorough and have excellent work ethic. There estimate was exactly what I paid, without any hidden fees. As well as being very reasonable. They are local and I will use them again for any future projects."
Swanstone Bathroom
 New home
Swanstone Bathroom
 Common ash flooring 5" wide
Swanstone Bathroom

+5

Recommended by100%of homeowners
Avatar for Gooshaw Construction Services
Gooshaw Construction Services
5.0(
9
)
Basement - Remodel

Serving Nassau, NY and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"I had several projects I needed completed. Gooshaw Construction responded to my Anji inquiry regarding a bathroom remodel. We made appt. within days to meet and explain what I wanted. They showed up exactly as set up and listened to exactly what I wanted. Long story short bathroom remodel, kitchen and foyer upgrade, new fencing, deck powered washed and painted later I can whole heartedly endorse Gooshaw Construction. At each stage i was presented with a complete quote including pricing and timeline. In all phases they completely followed as agreed and with an eye for detail and integrity. I highly recommend."
Response time2 days
Response rate89%
Recommended by77%of homeowners
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FAQs for basement remodeling projects in Nassau, 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 Nassau, NY homeowners’ guide to basement remodelings

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