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Find Basement remodelers in Cos Cob

Avatar for Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
4.3(
397
)
Basement - Remodel

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1987

Free estimates

Warranties offered

"Great results from waterproofing. Turned my spring flooding anxiety to calm. As humidity rose in summer, I put in a small dehumidifier. Made basement noisy as it struggled to dry and produced a lot of heat. As temperatures rose to about 83 down there and the humidity rose to over 68%, I had same people put in a whole basement commercial-grade dehumidifier. The small unit dropped the humidity to around 50% in less than an hour. Incredible performance and have me peace of mind and peace and quiet downstairs. Temperature dropped gas as well. Weel worth the price to save my most expensive investment."
Additional Photos
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Additional Photos

+12

51 neighbors recently requested a quote
Recommended by91%of homeowners
Hill Top Remodeling, LLC
4.6(
36
)
Basement - Remodel

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Bill came over and looked at my basement gave me a quote. I had 3 other quotes but not from Angie’s List. Bills was the best quote. He also noticed I had a water problem and my sub pump was not working correctly and he recommended Connecticut basement. I also contacted them. Thanks to Bill now I have a new basement and a lifetime warranty from Connecticut basement for my sub pump and water leak. If it wasn’t for Bill my basement would still have water problems."
Response time2 days
Response rate91%
21 neighbors recently requested a quote
Avatar for A2Z Contractors, LLC
A2Z Contractors, LLC
4.6(
133
)
Basement - Remodel

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"I did lots of research on contractors for my bathroom remodel and took a chance with A2Z and Im very happy i found them! Communication and follow up was high level from what i was accustomed to. Work was quick and quality."
bathroom
bathroom
bathroom
bathroom
bathroom

+5

Response time2 days
40 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Pella Home Improvement
Pella Home Improvement
4.0(
35
)
Basement - Remodel

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"Customer Service was by far above expectations. I felt my basement was as important to Pella as it was to me. Also, we were given great recommendations throughout the process. Quality of the work was very good. Only area for improvement was that the upfront estimate had a couple minor misses, and I would have liked the laminate planks to have been laid with 3-4 row repeating pattern rather than a 2 row; but I never made that expectation known upfront. Overall an excellent experience and I highly recommend!"
Bathroom Remodeling
Bathroom Remodeling
Bathroom Remodeling
Bathroom Remodeling
Bathroom Remodeling

+13

Response time2 days
Response rate100%
4 neighbors recently requested a quote
Avatar for Lasting Strength
Lasting Strength
5.0(
46
)
Basement - Remodel

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1994

Free estimates

Customers say: Quick response

"My husband and I hired Lasting Strength after a very stressful experience dealing with a previous contractor who did a terrible job remodeling our bathroom--specifically a horrible shower tile job. Adam came to our house to give us an estimate within the week and began work three days later. He was extremely detail-oriented and skilled. He and his associate Danny repaired our bathroom tile work and also did our planned kitchen reno. He did all the carpentry/cabinet work in the kitchen and suggested ideas of how to handle some challenging issues in our kitchen. He executed brilliantly on all these things and left our new kitchen looking exactly as we dreamed it would look. He also recommended a skilled electrician and plumber who we worked with for the other aspects of the kitchen renovation. We were incredibly satisfied with all the work done on our kitchen and bathroom so we asked Adam to repair some rotted wood in our main door entryway area. The wood rot and damage was significantly more extensive than we originally thought, but Adam and Danny did a great job repairing the structural damage and then laid tile over the repaired area. A beautiful tile job, by the way! We couldn't be happier with our home renovation and with our decision to hire Lasting Strength. In addition to being top-knotch professionals, Adam and Danny are also extremely friendly and always willing to go the extra mile for my home. My family will be keeping Adam's number for any future home needs we have. We HIGHLY recommend Lasting Strength."
tv cabinet built in
shower
wine cellar
built in
pergola

+116

Response time4 days
Response rate100%
10 neighbors recently requested a quote
Avatar for HammerTime Construction Group
HammerTime Construction Group
5.0(
10
)
Basement - Remodel

Serving Cos Cob, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Emergency services offered

"There are not enough great things I can share about HammerTime Construction, and every single member of their team. From consultation to project completion, the high level of professionalism, expertise, SKILL, attention to detail, and superior craftsmanship was exemplary! We contacted William via Angi (blindly!) in hopes of helping my elderly parents restore their kitchen, and he agreed to come by that same day - a weekend- to do an assessment, and provide a quote. He assured us he'd work within our budget, and he stuck to his word. We were in constant contact for everything from project concept to contract to which materials we'd be selecting. Our expectations were surpassed 10-fold!! Hire them. Just look at the photos! Our parents' home was completely transformed in the best possible way. It will now be a source of pride and an enjoyable gathering space for all who visit. On top of the kitchen remodel, they also restored our hardwood floors to a beautiful state we didn't even know was possible. Miguel, Ignacio and the entire team were speedy, efficient and completely caring as though this were their own family's home. We will be returning to this company for future projects, and we recommend them with zero hesitation!!"
This was a larger bathroom with two accent walls, a tub and sauna shower with jetted shower heads, a custom-cut ceiling, heated pebble flooring, and a mini wooden walkway.
The client wanted a tub sitting on pebble stones with an accent wall, wooden look custom shelving, and a smart floating toilet.
The image showcases a contemporary stand-up shower featuring frameless glass doors that provide a seamless, open look. The interior is adorned with large marble tiles in a soft, neutral tone, giving the shower a luxurious feel.

Built-in niches provide stylish and practical storage for toiletries, while subtle LED lighting enhances the overall ambiance.
Remodeling - General Project
Fireplace Renovation

+41

26 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for Cecy Gillen Designs, LLC
Cecy Gillen Designs, LLC
4.9(
77
)
Basement - Remodel

Serving Cos Cob, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Warranties offered

"Cecy & team were a pleasure to work with. We did multiple projects with them including a bathroom remodel, full house painting, kitchen cabinet painting, basement remediation, and many other small projects and were very happy with everything. Cecy and her team were incredibly responsive and helpful. Would definitely recommend,"
INTERIOR & EXTERIOR PAINT
Re-configure Closet space
BUILT-INS
INTERIOR DECOR
KITCHENS

+308

Response time4 days
Response rate91%
Recommended by75%of homeowners
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Showing 1-10 of 385
FAQs for basement remodeling projects in Cos Cob, CT

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 Cos Cob, CT homeowners’ guide to basement remodelings

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