Top-rated basement remodelers.

Get matched with top basement remodelers in Islip, NY

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Basement remodelers in Islip

Avatar for Stars and Stripes Home Improvement LLC
Stars and Stripes Home Improvement LLC
4.9(
265
)

Serving Islip, NY and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2017

Free estimates

Emergency services offered

"We hired Stars and Stripes for a few projects around our home. The main one was our kitchen re-model. The project was done professionally, beautifully, and ON TIME! We would definitely recommend (and continue to use) Stars and Stripes. I?ve attached some before and after pics to see their work. "
Remodeling - Kitchen & Bathroom Project
VEGA KITCHEN
Painting - Interior Project
Complete Renovation
Basement

+699

Response time3 days
13 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for JBL HOME IMPROVEMENTS INC
JBL HOME IMPROVEMENTS INC
4.9(
227
)

Serving Islip, NY and surrounding areas

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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+23

Response time1 day
Response rate89%
16 neighbors recently requested a quote
Avatar for HM Construction Group, Inc. (Long Island Handyman Group)
HM Construction Group, Inc. (Long Island Handyman Group)
5.0(
21
)

Serving Islip, NY and surrounding areas

Angi Approved

In business since 2017

Free estimates

Emergency services offered

"Eddie was great to work with! We had a limited time frame to adhere to town inspections and Eddie and his team knew exactly what we needed and quickly got the job done. The results were great and even the inspector acknowledged the impressive repair. They were able to put a knocked out garage wall back on the foundation and repair the interior dry wall. I would recommend this company for any professional contract work due to their reasonable price, ease to work with and quality of work."
Recommended by90%of homeowners
Avatar for DC The GC Inc.
DC The GC Inc.
5.0(
20
)

Serving Islip, NY and surrounding areas

Angi Approved

In business since 2022

Free estimates

Credit card accepted

"Great work- timely communication and he explained everything in detail - he gave us a lot of options and are very happy with the quality of the work - FLOORS LOOK AMAZING! plan to do more in the future ! I would recommend DC the GC to anyone."
Basement Remodel
After
After
Basement Remodel
After

+54

Response time3 hrs
Response rate93%
1 neighbors recently requested a quote
Avatar for VP Quality Contracting
VP Quality Contracting
4.9(
58
)

Serving Islip, NY and surrounding areas

Angi Approved

In business since 2008

Free estimates

Emergency services offered

"Vinny and his work crew were very reliable the timeline for the project was perfect there workmanship is beyond what I expected I absolutely love my new bathroom I'm currently looking into redoing my kitchen and I will only use VP Quality contracting I highly recommend this company"
New Door
New Door
Old Door
Old Door
Old Bathroom

+26

Response time9 hrs
Response rate93%
Recommended by91%of homeowners
Avatar for Golden Ladder Construction
Golden Ladder Construction
5.0(
10
)

Serving Islip, NY and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2013

Free estimates

Warranties offered

"Joe did a fantastic job rebuilding a closet in my brothers house. As well as building a new wall in my home. His work is high quality and his price is very reasonable by comparison to other contractors out there. Cleans up extremely well afterwards also. Highly recommend"
Custom Cabinetry
LED mirror
Custom Vanity
Niche & Bench
Multifunctional

+53

Response time50 mins
Response rate94%
1 neighbors recently requested a quote
Avatar for Exterior Team Home Services, Inc.
Exterior Team Home Services, Inc.
5.0(
22
)

Serving Islip, NY and surrounding areas

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."
Roof in process
Roof done
Roof in process
Job done in Ronkonkoma
Job done

+1

Response time4 hrs
1 neighbors recently requested a quote
Recommended by95%of homeowners
...
Showing 1-10 of 1772
FAQs for basement remodeling projects in Islip, 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 Islip, NY homeowners’ guide to basement remodelings

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