Get matched with top basement leak repair pros in Cos Cob, CT
There are 20 highly-rated local basement leak repair pros.
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77 Verified Reviews for Basement Leak Repair pros in Cos Cob, CT
*The Angi rating for Basement Leak Repair companies in Cos Cob, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Leak Repair needs.
*The HomeAdvisor rating for Basement Leak Repair companies in Cos Cob, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Leak Repair needs.
Last update on May 30, 2025
Basement leak repair pros in Cos Cob
Dirty Deeds Inc. is a family owned and operated company. We pride ourselves on our integrity and ability to provide professional and individualized waterproofing services. We offer you the best possible solution to your particular needs, offering a wide range of internal or external solutions. Our business owner Dean has 40 years experience specializing exclusively in basement waterproofing, his work has been recognized and featured in “This Old House Magazine,” showcased on our website: dirtydeedswaterproofing.com Give us a call to schedule your free inspection to identify, mitigate, and resolve your water issues.
"My sewage ejector pump in basement would not stop running and I was looking to replace it. I texted Dean two pictures of the pump, he was able to give me a quote over text and the price was quite reasonable. He received a new pump on 5/22/2023 and came over to my house. After opening up the old pump and checking, he told me that the only thing that is really broken is the check valve, the switch got stuck but is still functioning, and the pump itself works fine. I ended up asking him to only replace the check valve and the switch and this saved me about $1000 from the original plan. I appreciate Dean's honesty, professionalism, and a job well done."
Haifeng Q on June 2023
Dirty Deeds Inc. is a family owned and operated company. We pride ourselves on our integrity and ability to provide professional and individualized waterproofing services. We offer you the best possible solution to your particular needs, offering a wide range of internal or external solutions. Our business owner Dean has 40 years experience specializing exclusively in basement waterproofing, his work has been recognized and featured in “This Old House Magazine,” showcased on our website: dirtydeedswaterproofing.com Give us a call to schedule your free inspection to identify, mitigate, and resolve your water issues.
"My sewage ejector pump in basement would not stop running and I was looking to replace it. I texted Dean two pictures of the pump, he was able to give me a quote over text and the price was quite reasonable. He received a new pump on 5/22/2023 and came over to my house. After opening up the old pump and checking, he told me that the only thing that is really broken is the check valve, the switch got stuck but is still functioning, and the pump itself works fine. I ended up asking him to only replace the check valve and the switch and this saved me about $1000 from the original plan. I appreciate Dean's honesty, professionalism, and a job well done."
Haifeng Q on June 2023
We are a full service remodeling company. We specialize in kitchen and bath, tile, carpentry, painting exterior and interior, general and basement remodels. Call us we are here to address all your remodeling needs.
"All our projects were completed competently and on time. Communication was excellent. Work was efficiently done and areas left clean. Workers are nice people."
Judy S on October 2024
We are a full service remodeling company. We specialize in kitchen and bath, tile, carpentry, painting exterior and interior, general and basement remodels. Call us we are here to address all your remodeling needs.
"All our projects were completed competently and on time. Communication was excellent. Work was efficiently done and areas left clean. Workers are nice people."
Judy S on October 2024
NOVA DESIGN BUILD is an innovative design-built firm distinguished by an integrated approach that goes beyond the limits of traditional interior design and home decoration or home remodeling practices. As a combined practice of a design studio, a general contracting team and a fabrication shop we pride ourselves on creating individually tailored interiors that feature unique design, solid construction and quality finishes. Our endeavor is driven to the pursuit of perfection and extreme attention to detail. We bring our extensive expertise in a range of disciplines to meet our client needs whether that means designing, building and renovating, creating bespoke custom cabinetry or decorating and furnishing your home. Our disciplines - Renovation, Custom Cabinetry, Interior Design & Decoration – can be approached as separate elements or as an integrated solution.
"Nova Design was professional, prompt, cost effective, competent, creative and courteous. I will use them again and absolutely recommend them."
Nariman T on June 2024
NOVA DESIGN BUILD is an innovative design-built firm distinguished by an integrated approach that goes beyond the limits of traditional interior design and home decoration or home remodeling practices. As a combined practice of a design studio, a general contracting team and a fabrication shop we pride ourselves on creating individually tailored interiors that feature unique design, solid construction and quality finishes. Our endeavor is driven to the pursuit of perfection and extreme attention to detail. We bring our extensive expertise in a range of disciplines to meet our client needs whether that means designing, building and renovating, creating bespoke custom cabinetry or decorating and furnishing your home. Our disciplines - Renovation, Custom Cabinetry, Interior Design & Decoration – can be approached as separate elements or as an integrated solution.
"Nova Design was professional, prompt, cost effective, competent, creative and courteous. I will use them again and absolutely recommend them."
Nariman T on June 2024
Additional e-mail - [email protected]. Award winning. The Mission of Better Built Basements, LLC is to have Connecticut homeowners select us as their remodeling contractor by providing innovative and affordable basement solutions. We strive to build trust and confidence with our customers with precise quotes, honest and consistent communication, professional appearance and demeanor, and accurate time lines for every project.
"Unfortunately I give BBB a 1 star rating. The project began October of 2021 with demolition, upon completion of each phase I sent an email to Better Built Basement management thanking them for their work effort and identifying items that either required further explanation and/or resolution. As the project went on, I became increasingly frustrated with their lack of communication, lack of accountability, lack of caring, and lack of skill. The straw that broke my back was when Jim (an owner) called me a f’ing c’sucker. Randy, (an owner) sent me the following email: No one has time to read your 3-page condensing e-mails. You have done nothing but complaint. It's obnoxious and draining to everyone you come in contact with. There isn't one person who cant wait to have you out of our lives. I terminated Better Built Basements on June 7th, 2022, here are some of the details of my experience: - The demo crew was excellent in and out in a day and did a great job cleaning up - The electricians were very consultative in their approach to the project, providing input on lighting and outlet placements. - Framing was mediocre. Despite using laser equipment, one wall was wavy and the ceiling grid has a large gap. Pictures attached. - New steel stud framing and pre-hung doors should be dead on straight as an arrow instead, two of the doors has an aesthetically noticeable skew. - The replacement to an existing door resulted in using the wrong hinge set for the existing mortices, inclusive of color – all the other hardware is brass they used chrome. Picture attached. - 3 of the four doors were either chipped or cracked. BBB was notified before the ‘final’ paint job, but they failed to address the issue. - I returned home the day they applied joint compound to find glops of joint compound on the floor, which I tracked around my house, and glops on wood work on a floor where no work was occurring. Pictures attached - Following the flooring installation, they left garbage in my basement for 2.5 weeks, then did not take it when they came back – in frustration I disposed of it myself. - Many of joints on the ¼ round trim molding were caulked excessively to cover up sloppy miters. - Cracked switchhplate was not replaced. Picture attached. - Sub-contractors have sub-contractors, who seem to be able to sub contract – direct employees of BBB other than the demo and electrical were rare. BBB demands using a lock box, Many people have the combination, providing little sense of security over access to the home. Overall, BBB does a bad job communicating, managing expectations and fails to deliver on their stated objectives at best they are contractors not craftsman."
Lou Z on September 2022
Additional e-mail - [email protected]. Award winning. The Mission of Better Built Basements, LLC is to have Connecticut homeowners select us as their remodeling contractor by providing innovative and affordable basement solutions. We strive to build trust and confidence with our customers with precise quotes, honest and consistent communication, professional appearance and demeanor, and accurate time lines for every project.
"Unfortunately I give BBB a 1 star rating. The project began October of 2021 with demolition, upon completion of each phase I sent an email to Better Built Basement management thanking them for their work effort and identifying items that either required further explanation and/or resolution. As the project went on, I became increasingly frustrated with their lack of communication, lack of accountability, lack of caring, and lack of skill. The straw that broke my back was when Jim (an owner) called me a f’ing c’sucker. Randy, (an owner) sent me the following email: No one has time to read your 3-page condensing e-mails. You have done nothing but complaint. It's obnoxious and draining to everyone you come in contact with. There isn't one person who cant wait to have you out of our lives. I terminated Better Built Basements on June 7th, 2022, here are some of the details of my experience: - The demo crew was excellent in and out in a day and did a great job cleaning up - The electricians were very consultative in their approach to the project, providing input on lighting and outlet placements. - Framing was mediocre. Despite using laser equipment, one wall was wavy and the ceiling grid has a large gap. Pictures attached. - New steel stud framing and pre-hung doors should be dead on straight as an arrow instead, two of the doors has an aesthetically noticeable skew. - The replacement to an existing door resulted in using the wrong hinge set for the existing mortices, inclusive of color – all the other hardware is brass they used chrome. Picture attached. - 3 of the four doors were either chipped or cracked. BBB was notified before the ‘final’ paint job, but they failed to address the issue. - I returned home the day they applied joint compound to find glops of joint compound on the floor, which I tracked around my house, and glops on wood work on a floor where no work was occurring. Pictures attached - Following the flooring installation, they left garbage in my basement for 2.5 weeks, then did not take it when they came back – in frustration I disposed of it myself. - Many of joints on the ¼ round trim molding were caulked excessively to cover up sloppy miters. - Cracked switchhplate was not replaced. Picture attached. - Sub-contractors have sub-contractors, who seem to be able to sub contract – direct employees of BBB other than the demo and electrical were rare. BBB demands using a lock box, Many people have the combination, providing little sense of security over access to the home. Overall, BBB does a bad job communicating, managing expectations and fails to deliver on their stated objectives at best they are contractors not craftsman."
Lou Z on September 2022
HM Construction and Painting was founded in 1990 to provide customers with the most incredible home remodeling and renovating services in Fairfield County. We Provide Architectural and Structural Drawing Design Services. We provide general contractor services to both residential and commercial customers. Above all, our goal is to give you an extraordinary standard of excellence, quality, and professionalism each and every time you hire us. We know that referrals run businesses, so we strive to give you the best experience possible. From painting to carpentry home repair and from roofing to flooring, there is very little we can’t do! We specialize in bringing homeowners’ dreams to life. Whether you’re making a few cosmetic changes or you’re gutting a room and starting over, we are fully equipped to take your project on. We proudly provide service to Greenwich, CT and Darien, CT, as well as the surrounding areas! Ready to get started? Take a look at our Services page to see what we can offer you. Don’t forget, we offer free estimates at your convenience, so feel free to contact us at any time for an estimate.
"We were very pleased with the job performed. Helio's team expanded and renovated our small master bathroom. We took out a large closet and converted it into our shower. Once started, they worked quickly and efficiently. We did have a few small hiccups, namely using our garage to cut tiles and mix thinset, which created an exorbitant amount of dust coating my tools, bikes, and anything else that was stored in the garage. We also had an issue with the cleanliness of the home after some of the workers left, however, after we brought it to Helio's attention, he made sure to tell the team to do a better job moving forward. Contract was a little confusing, so I would encourage many questions to clarify things ahead of time such as timeline for selecting certain items, confirming when the next payments are due etc. All in all, we're pleased with the project and how it turned out."
Mike M on February 2025
HM Construction and Painting was founded in 1990 to provide customers with the most incredible home remodeling and renovating services in Fairfield County. We Provide Architectural and Structural Drawing Design Services. We provide general contractor services to both residential and commercial customers. Above all, our goal is to give you an extraordinary standard of excellence, quality, and professionalism each and every time you hire us. We know that referrals run businesses, so we strive to give you the best experience possible. From painting to carpentry home repair and from roofing to flooring, there is very little we can’t do! We specialize in bringing homeowners’ dreams to life. Whether you’re making a few cosmetic changes or you’re gutting a room and starting over, we are fully equipped to take your project on. We proudly provide service to Greenwich, CT and Darien, CT, as well as the surrounding areas! Ready to get started? Take a look at our Services page to see what we can offer you. Don’t forget, we offer free estimates at your convenience, so feel free to contact us at any time for an estimate.
"We were very pleased with the job performed. Helio's team expanded and renovated our small master bathroom. We took out a large closet and converted it into our shower. Once started, they worked quickly and efficiently. We did have a few small hiccups, namely using our garage to cut tiles and mix thinset, which created an exorbitant amount of dust coating my tools, bikes, and anything else that was stored in the garage. We also had an issue with the cleanliness of the home after some of the workers left, however, after we brought it to Helio's attention, he made sure to tell the team to do a better job moving forward. Contract was a little confusing, so I would encourage many questions to clarify things ahead of time such as timeline for selecting certain items, confirming when the next payments are due etc. All in all, we're pleased with the project and how it turned out."
Mike M on February 2025
Omega Development is a Fairfield, County staple. With over 20+ years of experience Omega is your one stop shop for all things construction.
"I recently had an asphalt driveway put in. The crew was very professional. The driveway is smooth and very happy with the quality of the new driveway. They even went above and beyond and put in a small drainage area for water runoff. It has definitely improved the appearance of my home."
Elaine A on February 2025
Omega Development is a Fairfield, County staple. With over 20+ years of experience Omega is your one stop shop for all things construction.
"I recently had an asphalt driveway put in. The crew was very professional. The driveway is smooth and very happy with the quality of the new driveway. They even went above and beyond and put in a small drainage area for water runoff. It has definitely improved the appearance of my home."
Elaine A on February 2025
At JF Home Services we take pride in offering a wide range of home improvement services designed to elevate the functionality and aesthetics of your living space. From minor handyman tasks to extensive renovations, we’ve got the skilled personnel and expertise to handle it all. Diverse Expertise: Our team comprises experienced professionals specializing in various fields, including carpentry, painting, plumbing, and electrical work. No job is too small or too large for us, we’re here to address your home improvement needs with precision and care. Our Services Include: Kitchen & Bathroom Renovations Interior & Exterior Painting Hardwood Floor Staining & Polishing Deck Refinishing & Repairs General Handyman Repairs
"Excellent work!! They are not only professional but also reliable. The project was completed as expected and on time. I would definitely recommend them."
Fernanda R on December 2024
At JF Home Services we take pride in offering a wide range of home improvement services designed to elevate the functionality and aesthetics of your living space. From minor handyman tasks to extensive renovations, we’ve got the skilled personnel and expertise to handle it all. Diverse Expertise: Our team comprises experienced professionals specializing in various fields, including carpentry, painting, plumbing, and electrical work. No job is too small or too large for us, we’re here to address your home improvement needs with precision and care. Our Services Include: Kitchen & Bathroom Renovations Interior & Exterior Painting Hardwood Floor Staining & Polishing Deck Refinishing & Repairs General Handyman Repairs
"Excellent work!! They are not only professional but also reliable. The project was completed as expected and on time. I would definitely recommend them."
Fernanda R on December 2024
Finding the right NYC residential renovation contractor can be a difficult and stressful undertaking. We at Fine Construction simplify the process of renovation, clarifying condominium and cooperative requirements, obtaining city permits as needed, and ensuring the construction is carried out in a clean and environmentally friendly manner. We work with top subcontractors and designers to coordinate all phases of the construction process—ensuring your vision becomes reality. Visit us at www.finecs.nyc to view more of what we can do to make your dreams a reality.
"I highly recommend Fine Construction Services. Ciaran and his team are detail oriented and a pleasure to work with. I look forward to working together again!"
Jonathan P on February 2021
Finding the right NYC residential renovation contractor can be a difficult and stressful undertaking. We at Fine Construction simplify the process of renovation, clarifying condominium and cooperative requirements, obtaining city permits as needed, and ensuring the construction is carried out in a clean and environmentally friendly manner. We work with top subcontractors and designers to coordinate all phases of the construction process—ensuring your vision becomes reality. Visit us at www.finecs.nyc to view more of what we can do to make your dreams a reality.
"I highly recommend Fine Construction Services. Ciaran and his team are detail oriented and a pleasure to work with. I look forward to working together again!"
Jonathan P on February 2021
Free housecleaning with whole-house paint project and special pricing for Angie's Members. Tapia Home Improvement is a locally owned and operated company with over 13 years of experience in our trade. We specialize in home improvement projects with services including: Remodeling (General, Kitchen & Bathroom), Painting (Interior & Exterior), Drywall/Sheetrock, Ceramic Tile, Flooring, Cabinets, Counter-tops and much more. We pride ourselves in the quality of our work and our unparalleled customer satisfaction. We strive to provide the highest levels of customer service. Call us today to schedule an appointment.
"Excellent. On time finished the job with high detail. Crew was very thorough and on time. Miguel is a expert contractor and I enjoy working with him"
Ray D on August 2024
Free housecleaning with whole-house paint project and special pricing for Angie's Members. Tapia Home Improvement is a locally owned and operated company with over 13 years of experience in our trade. We specialize in home improvement projects with services including: Remodeling (General, Kitchen & Bathroom), Painting (Interior & Exterior), Drywall/Sheetrock, Ceramic Tile, Flooring, Cabinets, Counter-tops and much more. We pride ourselves in the quality of our work and our unparalleled customer satisfaction. We strive to provide the highest levels of customer service. Call us today to schedule an appointment.
"Excellent. On time finished the job with high detail. Crew was very thorough and on time. Miguel is a expert contractor and I enjoy working with him"
Ray D on August 2024
We specialize in basement waterproofing, foundation sealing and crack repair, yard drainage, yard grading, gravel road maintenance, small excavation. We pride ourselves on the quality work we provide, while delivering great customer service. Check out all the services we offer below and call -or- click to schedule a free estimate today!
"Kris was and is a true professional who takes great pride in his work. Kris carefully explained the procedure and what we should expect. The job was executed in a very timely manner."
Joseph K on September 2024
We specialize in basement waterproofing, foundation sealing and crack repair, yard drainage, yard grading, gravel road maintenance, small excavation. We pride ourselves on the quality work we provide, while delivering great customer service. Check out all the services we offer below and call -or- click to schedule a free estimate today!
"Kris was and is a true professional who takes great pride in his work. Kris carefully explained the procedure and what we should expect. The job was executed in a very timely manner."
Joseph K on September 2024
Basement leak repair services FAQs
The cost to finish a basement is $18,400 for the average homeowner. However, this cost could be as little as $2,800 or as much as $34,500, depending on the basement size and the materials needed. If your basement is already outfitted with electrical and plumbing, expect the cost to fall on the lower end.
For example, the drywall cost for this project averages around $1,750, but other features, like hiring a plumber, cost between $45 and $200 per hour.
The cost to remodel a basement is between $12,100 and $33,400 for the average homeowner. The price you pay can be as little as $3,500 or as much as $50,200, depending on the size and condition of your basement and the type of remodel you're doing.
If you're doing a simple project like adding a home office to your basement, you can expect to pay anywhere from $500 to $3,000. However, if you're adding a bathroom, which is an extensive project, you can expect to pay between $6,600 to $16,500.
Damp proofing and waterproofing are both methods to help keep your basement dry. Damp proofing keeps soil moisture from entering your basement, which is helpful since your basement is underground. Waterproofing, however, keeps both soil moisture and liquid water out of the basement, which is essential, especially if you live in a wet environment. Because it’s more protective, waterproofing typically costs more than damp proofing.
Although homeowners often use the terms basement remodeling and basement finishing interchangeably, they are quite different terms.
Finishing a basement is the process of taking a basement space that is not habitable and adding elements to make it usable. This includes adding plumbing, flooring, and insulation.
Remodeling a basement means taking an already existing finished basement and changing it, often by adding or removing walls, adding plumbing, or changing the existing flooring.
The cost of basement waterproofing is $4,950 for the average homeowner. However, you could end up paying between $600 and $14,000, depending on factors like basement size, waterproofing method, and the region you live in.
If you live in an area with heavy rainfall, you might be paying more for waterproofing than if you lived somewhere drier since waterproofing contractors would be in high demand. Likewise, a 500-foot basement costs between $2,500 and $5,000 to waterproof, but that price rises significantly for a larger basement.
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