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Find Addition to existing structure builders in Greenwich

Avatar for JR General Contractor, LLC

JR General Contractor, LLC

4.83(
15
)
•Approved Pro

JR General Contractor, LLC

4.83(
15
)
•Approved Pro
Customers say: Quick response
15 years of experience
Free onsite estimate

JR General Contractor LLC, is committed to excellence every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Yes they did an excellent job"

Louise R on May 2025

JR General Contractor LLC, is committed to excellence every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Yes they did an excellent job"

Louise R on May 2025

Avatar for Newfield Development Company

Newfield Development Company

5.00(
1
)
•Approved Pro

Newfield Development Company

5.00(
1
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
33 years of experience

We provide a full range of contracting and construction management services. Planning, pre-construction and construction services can be delivered in a variety of ways to meet the specific needs of your project. Our projects include - New Homes - Additions, large & small - Renovations - New Kitchens - New Baths - Elevator Installations - Land Development - Sub-divisions - Home Repairs - Basement De-watering

"He was honest, completely upfront and trustworthy. He kept us informed of what was happening, and overall did a great job--very happy!"

Catherine N on August 2014

We provide a full range of contracting and construction management services. Planning, pre-construction and construction services can be delivered in a variety of ways to meet the specific needs of your project. Our projects include - New Homes - Additions, large & small - Renovations - New Kitchens - New Baths - Elevator Installations - Land Development - Sub-divisions - Home Repairs - Basement De-watering

"He was honest, completely upfront and trustworthy. He kept us informed of what was happening, and overall did a great job--very happy!"

Catherine N on August 2014

Avatar for C & C Contractor LLC

C & C Contractor LLC

5.00(
5
)
•Approved Pro

C & C Contractor LLC

5.00(
5
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
57 local quotes requested

Our team of highly trained, professionals will perform with dedication and high-quality materials to achieve any remodeling project you want on your property. We guarantee your total satisfaction!

"I. contact this. company because my dad. recommended. me they are. great contractor company now my basement and deck are. beautiful and I recommend this company. to all my friends and family"

evelyn f on November 2024

Our team of highly trained, professionals will perform with dedication and high-quality materials to achieve any remodeling project you want on your property. We guarantee your total satisfaction!

"I. contact this. company because my dad. recommended. me they are. great contractor company now my basement and deck are. beautiful and I recommend this company. to all my friends and family"

evelyn f on November 2024

Avatar for Douglas Marshall Cooper Associates, LLC

Douglas Marshall Cooper Associates, LLC

4.63(
22
)
•Approved Pro

Douglas Marshall Cooper Associates, LLC

4.63(
22
)
•Approved Pro
Customers say: Quick response
29 years of experience
Free onsite estimate

Douglas Marshall Cooper Associates is a full-service design and construction firm whose practice encompasses both new and existing buildings of residential and commercial use, as well as speculative housing and development. Mr. Cooper’s office is located in Pound Ridge, New York and includes a staff of himself, an associate partner, three assistants and a host of carpenters, masons, and laborers, in addition to various subcontractors that work on projects small to large. Douglas Marshall Cooper Associate's roots are based in Construction, Design, Real Estate Investment and Development & Construction Management. Our portfolio includes a wide range of work across these fields. Our uniqueness comes from understanding what it is to be the Owner, the Developer and the Builder –- a trifecta that is evident in DMC Associate's core portfolio of prestigious residential, commercial, and corporate projects. Douglas Marshall Cooper Associates, LLC...a solid track record. A powerful future.

"I wish I could give zero stars. We hired Douglas for a kitchen remodel which involved installing a kitchen island, pantry, and all the related plumbing and electrical work. The communication between Douglas and his carpenter was terrible. We submitted sketches and agreed upon the design for the cabinets which were meant to be overlaid. When the island arrived, the cabinets were inset which did not match the rest of the kitchen. In addition, the kitchen island has split and cracked at more than half of the joints. The pantry cabinet has split and areas of unpainted MDF are showing. We have needed to paint and touch up many of these spots. Regarding the plumbing, we have had multiple significant leaks from piping and tubing that the team installed. Water has leaked even through the floor and into the basement. Upon review from other plumbers, all have confirmed the parts used were cheap and of low quality, and the workmanship was subpar. After a major leak in the middle of the night, we reached out to Douglas and respectfully voiced our issues and complaints. He ignored us for a full month, and then instead of simply stopping by to take a look at the problems (which would have been the first major step to alleviating our frustrations), he responded in a despicable manner. He even included the following quote from his lawyer, He laughed saying that perhaps you lost your job (due to the CoronaVirus) and were probably scrounging for any money you could scrape up. Who would want to work with someone like this?"

Keri P on October 2020

Douglas Marshall Cooper Associates is a full-service design and construction firm whose practice encompasses both new and existing buildings of residential and commercial use, as well as speculative housing and development. Mr. Cooper’s office is located in Pound Ridge, New York and includes a staff of himself, an associate partner, three assistants and a host of carpenters, masons, and laborers, in addition to various subcontractors that work on projects small to large. Douglas Marshall Cooper Associate's roots are based in Construction, Design, Real Estate Investment and Development & Construction Management. Our portfolio includes a wide range of work across these fields. Our uniqueness comes from understanding what it is to be the Owner, the Developer and the Builder –- a trifecta that is evident in DMC Associate's core portfolio of prestigious residential, commercial, and corporate projects. Douglas Marshall Cooper Associates, LLC...a solid track record. A powerful future.

"I wish I could give zero stars. We hired Douglas for a kitchen remodel which involved installing a kitchen island, pantry, and all the related plumbing and electrical work. The communication between Douglas and his carpenter was terrible. We submitted sketches and agreed upon the design for the cabinets which were meant to be overlaid. When the island arrived, the cabinets were inset which did not match the rest of the kitchen. In addition, the kitchen island has split and cracked at more than half of the joints. The pantry cabinet has split and areas of unpainted MDF are showing. We have needed to paint and touch up many of these spots. Regarding the plumbing, we have had multiple significant leaks from piping and tubing that the team installed. Water has leaked even through the floor and into the basement. Upon review from other plumbers, all have confirmed the parts used were cheap and of low quality, and the workmanship was subpar. After a major leak in the middle of the night, we reached out to Douglas and respectfully voiced our issues and complaints. He ignored us for a full month, and then instead of simply stopping by to take a look at the problems (which would have been the first major step to alleviating our frustrations), he responded in a despicable manner. He even included the following quote from his lawyer, He laughed saying that perhaps you lost your job (due to the CoronaVirus) and were probably scrounging for any money you could scrape up. Who would want to work with someone like this?"

Keri P on October 2020

C&C Quality Home Improvements

4.30(
93
)
•Approved Pro

C&C Quality Home Improvements

4.30(
93
)
•Approved Pro
Customers say: Terrific value
54 local quotes requested
22 years of experience

We are an interior renovations company. We have been in business for over 15 years. We have a strong focus on the quality of our work and strive to make each and every customer happy.

We are an interior renovations company. We have been in business for over 15 years. We have a strong focus on the quality of our work and strive to make each and every customer happy.

Strategic Operational Services

5.00(
11
)
•Approved Pro

Strategic Operational Services

5.00(
11
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
52 local quotes requested

~*~Strategic Operation Services offers any new customers a free consultation for any remodeling project!~*~ Strategic Operation Services is a family owned and operated business that services the Tri-State area. We are your one stop shop for any and all remodeling and construction services. We are licensed and insured so you can rest easy that your project will be completed in a quality, timely, and white glove manner! Call us today and see what we can do for you!

"It was a quality job done for a fair price range."

G M on August 2021

~*~Strategic Operation Services offers any new customers a free consultation for any remodeling project!~*~ Strategic Operation Services is a family owned and operated business that services the Tri-State area. We are your one stop shop for any and all remodeling and construction services. We are licensed and insured so you can rest easy that your project will be completed in a quality, timely, and white glove manner! Call us today and see what we can do for you!

"It was a quality job done for a fair price range."

G M on August 2021

Great Alaska Tree Company

New on HomeAdvisorNew on HomeAdvisor
•Approved Pro

Great Alaska Tree Company

New on HomeAdvisorNew on HomeAdvisor
•Approved Pro
53 local quotes requested
21 years of experience

Great Alaska Tree Company is an experienced tree service specialist, who offers professional and affordable tree care in Fairbanks AK. Do not hesitate and call us today! Tree Maintenance, Tree Care, Tree Specialist, Tree Expert, Tree Trimming College AK;Ester AK;Fox AK;North Pole AK;Moose Creek AK Tree Service, Tree Trimming, Tree Specialist, Tree Surgeon, Tree Maintenance http://greatalaskatreecompanyfairbanksak.com/

Great Alaska Tree Company is an experienced tree service specialist, who offers professional and affordable tree care in Fairbanks AK. Do not hesitate and call us today! Tree Maintenance, Tree Care, Tree Specialist, Tree Expert, Tree Trimming College AK;Ester AK;Fox AK;North Pole AK;Moose Creek AK Tree Service, Tree Trimming, Tree Specialist, Tree Surgeon, Tree Maintenance http://greatalaskatreecompanyfairbanksak.com/

Avatar for All Trades Contracting

All Trades Contracting

5.00(
1
)
•Approved Pro

All Trades Contracting

5.00(
1
)
•Approved Pro
35 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"The team helped us through one of the worst situations. Our home was severely damaged and flooded by Superstorm Sandy. We needed someone to help secure the existing structure, help oversee the insurance process and do the rebuild and remodel. We were very appreciative of the diligent work of this firm. They helped create a better design to prevent future flood risks, remodeled the house in full, and did it within our budget with insurance. In the beginning there were many nights where the team pulled all nighters."

Tracy B on June 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"The team helped us through one of the worst situations. Our home was severely damaged and flooded by Superstorm Sandy. We needed someone to help secure the existing structure, help oversee the insurance process and do the rebuild and remodel. We were very appreciative of the diligent work of this firm. They helped create a better design to prevent future flood risks, remodeled the house in full, and did it within our budget with insurance. In the beginning there were many nights where the team pulled all nighters."

Tracy B on June 2025

Avatar for TITO'S HOME IMPROVEMENT CONTRACTORS

TITO'S HOME IMPROVEMENT CONTRACTORS

4.65(
20
)
•Approved Pro

TITO'S HOME IMPROVEMENT CONTRACTORS

4.65(
20
)
•Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
23 local quotes requested

Tito's Home Improvement has been around since the early 1990s and has become one of the most widely recognized home remodeling companies in the area. We bring a new level of excellence to the table; from affordability and unparalleled craftsmanship, to providing an astounding selection of services, we know what it takes to be the best for our customers.With our experience and our dedication to providing nothing but the finest services, why would you want to go anywhere else for your home improvement and home remodeling needs? Contact the professionals at Tito's Home Improvement today and let us get to work for you!

"Excellent - Tito was extremely responsive and his team did excellent work. I shopped around and got multiple quotes, and his was the lowest. More importantly, he had done work on a number of my neighbors’ homes and came highly recommended. His team was very responsive and got the work done on a short time frame which was great because I needed much of the work done before I moved in to my new home. My floors and skylights look great and I have full confidence in his work. One thing which I really liked is the fact that he is constantly in communication, is always available, and is local. The last part is important because he understands the importance of reputation which gives me full confidence in his work. I will definitely be coming back to him again for any future work on my house and wholeheartedly recommend!"

Russell P on June 2022

Tito's Home Improvement has been around since the early 1990s and has become one of the most widely recognized home remodeling companies in the area. We bring a new level of excellence to the table; from affordability and unparalleled craftsmanship, to providing an astounding selection of services, we know what it takes to be the best for our customers.With our experience and our dedication to providing nothing but the finest services, why would you want to go anywhere else for your home improvement and home remodeling needs? Contact the professionals at Tito's Home Improvement today and let us get to work for you!

"Excellent - Tito was extremely responsive and his team did excellent work. I shopped around and got multiple quotes, and his was the lowest. More importantly, he had done work on a number of my neighbors’ homes and came highly recommended. His team was very responsive and got the work done on a short time frame which was great because I needed much of the work done before I moved in to my new home. My floors and skylights look great and I have full confidence in his work. One thing which I really liked is the fact that he is constantly in communication, is always available, and is local. The last part is important because he understands the importance of reputation which gives me full confidence in his work. I will definitely be coming back to him again for any future work on my house and wholeheartedly recommend!"

Russell P on June 2022

Avatar for Omega Development LLC

Omega Development LLC

4.69(
13
)
•Approved Pro

Omega Development LLC

4.69(
13
)
•Approved Pro
Customers say: Quick response
145 local quotes requested
21 years of experience

At Omega Development LLC, we bring your home improvement dreams to life with precision, quality, and craftsmanship you can trust. Our licensed and insured team specializes in home renovations, custom construction, kitchen and bathroom remodeling, additions, and exterior upgrades. With years of experience in the residential construction industry, we pride ourselves on delivering exceptional results, honest communication, and dependable service—from the first consultation to project completion. Whether you’re looking to modernize your space, increase your property value, or build your dream home, Omega Development LLC is your trusted partner for reliable, high-quality construction solutions. ✅ Our Services Include: Full Home Renovations & Remodels Kitchen & Bathroom Remodeling Home Additions & Basement Finishing Roofing, Siding & Exterior Improvements Custom Home Builds & Design-Build Services & more...

"I had an emergency and needed immediate help. They responded immediately, did the work the next day, were priced fairly and did excellent work. They get my highest recommendation! "

Gary N on October 2025

At Omega Development LLC, we bring your home improvement dreams to life with precision, quality, and craftsmanship you can trust. Our licensed and insured team specializes in home renovations, custom construction, kitchen and bathroom remodeling, additions, and exterior upgrades. With years of experience in the residential construction industry, we pride ourselves on delivering exceptional results, honest communication, and dependable service—from the first consultation to project completion. Whether you’re looking to modernize your space, increase your property value, or build your dream home, Omega Development LLC is your trusted partner for reliable, high-quality construction solutions. ✅ Our Services Include: Full Home Renovations & Remodels Kitchen & Bathroom Remodeling Home Additions & Basement Finishing Roofing, Siding & Exterior Improvements Custom Home Builds & Design-Build Services & more...

"I had an emergency and needed immediate help. They responded immediately, did the work the next day, were priced fairly and did excellent work. They get my highest recommendation! "

Gary N on October 2025

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FAQs for addition to existing structure building service projects in Greenwich, CT

Yes, hidden rooms are legal, as long as they meet all local building regulations. If you sell your house, most states require homeowners to disclose full houseplans, which would include any hidden rooms.

If your secret room is a safe room, it should contain a means of communication aside from a cell phone, such as a shortwave radio. You should also have plenty of drinking water, a portable generator, emergency food supplies, blankets, pillows, flashlights, batteries and a first aid kit.

Any time you update your home’s square footage, you increase its value, but a secret room is a niche feature that doesn't rank high on every buyer’s list of must-haves. Investing your money in remodeling more common living areas like bedrooms, bathrooms, or kitchens will have a higher ROI than adding a secret room. Many secret rooms can act as entertainment spaces (think a game room or wine cellar) or quiet spaces (a library or study), so when building your secret room you may want to consider its versatility for when you’re ready to sell.

The Greenwich, CT homeowners’ guide to addition to existing structure building services

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

See all articles