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Find Addition to existing structure builders in West Haven

Avatar for R and P Contracting, LLC

R and P Contracting, LLC

48 Matilda Lane
5.00(
6
)
Approved Pro

R and P Contracting, LLC

48 Matilda Lane
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 years of experience

30+ years in business, R and P Contracting, LLC, is a locally owned and operated company. We specialize in interior and exterior home renovations which include kitchen and bathroom remodeling as well as new homes, additions, garages and commercial work as well. We have completed hundreds of jobs in Fairfield and New Haven County. We focus on quality service and expect a high standard of excellence. Customer service and honesty are the most important aspects of our business and your satisfaction is guaranteed. Please call us today for an estimate. We look forward to working with you. ***WE ACCEPT CREDIT CARDS***

"I had a deck removed and an addition built. R and P were great to work with. I cleaned up the area every day upon finishing and really listened to my ideas, as well as making suggestions that made the project even better than anticipated. I would highly recommend them."

Peggy F on February 2019

30+ years in business, R and P Contracting, LLC, is a locally owned and operated company. We specialize in interior and exterior home renovations which include kitchen and bathroom remodeling as well as new homes, additions, garages and commercial work as well. We have completed hundreds of jobs in Fairfield and New Haven County. We focus on quality service and expect a high standard of excellence. Customer service and honesty are the most important aspects of our business and your satisfaction is guaranteed. Please call us today for an estimate. We look forward to working with you. ***WE ACCEPT CREDIT CARDS***

"I had a deck removed and an addition built. R and P were great to work with. I cleaned up the area every day upon finishing and really listened to my ideas, as well as making suggestions that made the project even better than anticipated. I would highly recommend them."

Peggy F on February 2019


Avatar for JR General Contractor, LLC

JR General Contractor, LLC

22 Olive Street
4.83(
15
)
Approved Pro

JR General Contractor, LLC

22 Olive Street
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 Devore & Company, LLC

Devore & Company, LLC

20 Hillandale Terrace
5.00(
1
)
Approved Pro

Devore & Company, LLC

20 Hillandale Terrace
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
5 years of experience

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"N/A"

Moira W on May 2021

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"N/A"

Moira W on May 2021


Avatar for J A L Construction

J A L Construction

334 Exeter St
5.00(
6
)
Approved Pro

J A L Construction

334 Exeter St
5.00(
6
)
Approved Pro
Customers say: Quick response
50 years of experience
Free onsite estimate

J A L Construction has over 50 years of experience delivering high-quality construction and remodeling services. Our experience speaks for itself—we take pride in reliability, clear communication, and craftsmanship that stands the test of time. Whether you’re planning a full home addition, remodeling your kitchen or bathroom, or updating your exterior, we bring skill and dedication to every job. Our services include additions, major renovations, kitchen and bath remodels, deck and porch builds, siding installation, structural steel beam work, window replacement, and brick, stone, or paver patios and walkways. We work closely with homeowners to understand their vision and deliver results that exceed expectations. At J A L Construction, no job is too big or small. We look forward to earning your trust and helping bring your next project to life.

"The job was done in a timely manor without any issues. This was important because it is my rental unit,"

Sharon Z on August 2025

J A L Construction has over 50 years of experience delivering high-quality construction and remodeling services. Our experience speaks for itself—we take pride in reliability, clear communication, and craftsmanship that stands the test of time. Whether you’re planning a full home addition, remodeling your kitchen or bathroom, or updating your exterior, we bring skill and dedication to every job. Our services include additions, major renovations, kitchen and bath remodels, deck and porch builds, siding installation, structural steel beam work, window replacement, and brick, stone, or paver patios and walkways. We work closely with homeowners to understand their vision and deliver results that exceed expectations. At J A L Construction, no job is too big or small. We look forward to earning your trust and helping bring your next project to life.

"The job was done in a timely manor without any issues. This was important because it is my rental unit,"

Sharon Z on August 2025


Avatar for Jermaine C Home Improvement, LLC

Jermaine C Home Improvement, LLC

115 Boston Ave
4.79(
19
)
Approved Pro

Jermaine C Home Improvement, LLC

115 Boston Ave
4.79(
19
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
352 local quotes requested

JC Home Improvement specializes in carpentry so we have great experience repairing deteriorated wood and fixing damaged sheetrock. We also remodel bedrooms, bathrooms and kitchens. Further more we take on small jobs installing household décor such as mirrors and ceiling fans and etc. We have an affordable and efficient pricing system. This system allows us to provide the best possible results for our clients and gives our clients peace of mind to make executive decisions. Jermaine Ferguson, owner of Jermaine C Home Improvement has over 15 years of experience as a carpenter and project manager. He is experienced in all areas of the services we offer. Jermaine is actively involved in each project at JC Home Improvement LLC.

"Jermaine is one of those handymen who is worth their weight in gold. I hired him and his team to perform a variety of odd jobs around my newly purchased house, and they stayed late - on a Friday afternoon no less - to successfully install appliances that Home Depot was unable to install (appliance installation was not on my original list because I didn’t think it was something Jermaine’s group did). All work Jermaine and his team did met or exceeded my expectations, and the entire time, Jermaine was focused on doing as much for me as he could. I will 100% hire Jermaine again the next time I need a handyman, and you should too."

Nick R on September 2025

JC Home Improvement specializes in carpentry so we have great experience repairing deteriorated wood and fixing damaged sheetrock. We also remodel bedrooms, bathrooms and kitchens. Further more we take on small jobs installing household décor such as mirrors and ceiling fans and etc. We have an affordable and efficient pricing system. This system allows us to provide the best possible results for our clients and gives our clients peace of mind to make executive decisions. Jermaine Ferguson, owner of Jermaine C Home Improvement has over 15 years of experience as a carpenter and project manager. He is experienced in all areas of the services we offer. Jermaine is actively involved in each project at JC Home Improvement LLC.

"Jermaine is one of those handymen who is worth their weight in gold. I hired him and his team to perform a variety of odd jobs around my newly purchased house, and they stayed late - on a Friday afternoon no less - to successfully install appliances that Home Depot was unable to install (appliance installation was not on my original list because I didn’t think it was something Jermaine’s group did). All work Jermaine and his team did met or exceeded my expectations, and the entire time, Jermaine was focused on doing as much for me as he could. I will 100% hire Jermaine again the next time I need a handyman, and you should too."

Nick R on September 2025


CSM Development Group, LLC

13 Sunset Ridge Road
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

CSM Development Group, LLC

13 Sunset Ridge Road
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
18 local quotes requested
11 years of experience

CSM Development Group, LLC is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

CSM Development Group, LLC is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!


"It went very well Highly recommended Very respectful and professional"

Ramazani t on November 2024

Family owned business with over 20 years experience - Remodeling Basements- Remodeling General- Remodeling Kitchen & Bathroom-

"It went very well Highly recommended Very respectful and professional"

Ramazani t on November 2024


"Bob and his crew are phenomenal. They are very professional and attentive to detail. All in all just a pleasure to work with. Couldn’t be happier with this project."

Jeremy M on May 2023

New Home Contractor with the staff and Knowledge to build your home on time and on budget. Licensed and Insured since 2015 with over 20 years experience in the new construction business. Let us work with you to build the home of your dreams!!

"Bob and his crew are phenomenal. They are very professional and attentive to detail. All in all just a pleasure to work with. Couldn’t be happier with this project."

Jeremy M on May 2023


Avatar for Dynamic Design & Remodeling

Dynamic Design & Remodeling

500 Post Road
5.00(
14
)
Approved Pro

Dynamic Design & Remodeling

500 Post Road
5.00(
14
)
Approved Pro
Super Service Award
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

We offer free estimates for any size project : kitchens, bathrooms, exteriors, roofing, additions, decks, bedrooms, basements, or even an entire home. We also provide design work with multiple photo realistic renderings and 360° views along with full floorplans and elevations, so you can really envision your new space before you build it. We help to guide our clients through every stage of a renovation so that it comes in on time and on budget. Call us today at 203-644-9124.

"I highly recommend DDR. There are so many contractors out there and it is difficult to know what youâ ll get when you hire someone, from the quality of the work to the level of communication. This team did a great job from start to finish, and delivered a beautiful new space for my family. We selected DDR after getting multiple bids to update our walk-out basement into a more livable space. Key in this selection -- the price was competitive, and the team seemed attentive to the project needs as outlined. I had a tight budget and relatively aggressive timeline for this project. Admittedly the timeline was impacted by a few things that were out of DDRâ s control, including the Town building inspectorâ s schedule and a delivery delay (a new window arrived damaged and had to be reordered.) Nevertheless, the team stayed on budget and delivered a wonderful new basement. What a great project team -- led by Alex, the team (including John + Angel) truly transformed a dark dingy space into a bright fresh room. Alex was very thoughtful in suggesting options that would improve things and was exceptionally attentive to detail. He was super responsive to any texts or questions. In particular, I appreciated his high level of â perfectionismâ in how the finished product turned out. For phase 2, we need some custom cabinetry built for the space and I look forward to having the DDR team return to work on this next phase."

Alison F on November 2024

We offer free estimates for any size project : kitchens, bathrooms, exteriors, roofing, additions, decks, bedrooms, basements, or even an entire home. We also provide design work with multiple photo realistic renderings and 360° views along with full floorplans and elevations, so you can really envision your new space before you build it. We help to guide our clients through every stage of a renovation so that it comes in on time and on budget. Call us today at 203-644-9124.

"I highly recommend DDR. There are so many contractors out there and it is difficult to know what youâ ll get when you hire someone, from the quality of the work to the level of communication. This team did a great job from start to finish, and delivered a beautiful new space for my family. We selected DDR after getting multiple bids to update our walk-out basement into a more livable space. Key in this selection -- the price was competitive, and the team seemed attentive to the project needs as outlined. I had a tight budget and relatively aggressive timeline for this project. Admittedly the timeline was impacted by a few things that were out of DDRâ s control, including the Town building inspectorâ s schedule and a delivery delay (a new window arrived damaged and had to be reordered.) Nevertheless, the team stayed on budget and delivered a wonderful new basement. What a great project team -- led by Alex, the team (including John + Angel) truly transformed a dark dingy space into a bright fresh room. Alex was very thoughtful in suggesting options that would improve things and was exceptionally attentive to detail. He was super responsive to any texts or questions. In particular, I appreciated his high level of â perfectionismâ in how the finished product turned out. For phase 2, we need some custom cabinetry built for the space and I look forward to having the DDR team return to work on this next phase."

Alison F on November 2024


Avatar for USL Outdoor Living LLC

USL Outdoor Living LLC

PO Box 627
5.00(
1
)
Approved Pro

USL Outdoor Living LLC

PO Box 627
5.00(
1
)
Approved Pro
19 local quotes requested
1 years of experience

With 30+ years experience, we offer only the best quality workmanship and professional courtesy. We specialize all phases of commercial and residential remodeling and outdoor living. We are committed quality work and outstanding results & are strongly involved in local community activities. We look forward to working with you!

With 30+ years experience, we offer only the best quality workmanship and professional courtesy. We specialize all phases of commercial and residential remodeling and outdoor living. We are committed quality work and outstanding results & are strongly involved in local community activities. We look forward to working with you!

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FAQs for addition to existing structure building service projects in West Haven, 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 West Haven, 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.

  • A renovated kitchen with a waterfall island

    HomeAdvisor’s DIY Kitchen Remodel Cost Guide looks at the cost of buying supplies and doing the work yourself. Find the key cost factors and how to cut expenses.

  • Secret room within bookcase

    HomeAdvisor's expert guide walks you through the cost to build a secret room, whether you're creating a safe room for security or a fun space to fulfil your childhood fantasies. Use this guide to help plan your secret room project and explore room, concea

  • outdoor patio bar

    Explore the cost to build a bar in your home and learn how materials, wet vs. dry bars, and labor costs influence the total price of your project.