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Find Addition to existing structure builders in Oakville

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
16 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 Waveleone Construction, LLC

Waveleone Construction, LLC

4.96(
25
)
Approved Pro

Waveleone Construction, LLC

4.96(
25
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
16 years of experience

With experience in project management, construction, and property management, we leverage our industry knowledge and vendor relationships to ensure your project receives the upmost quality to maximize your investment. Our management team and pre-qualified contractors possess the general characteristics of experience, reliability, and honesty. With outstanding communication skills, we coordinate the various trades, and assure the project meets the goals of on-time delivery, expected quality, and committed budget.

"Francis is very good! Polite, professional, considerate, and offers quality service!"

Juan S on April 2023

With experience in project management, construction, and property management, we leverage our industry knowledge and vendor relationships to ensure your project receives the upmost quality to maximize your investment. Our management team and pre-qualified contractors possess the general characteristics of experience, reliability, and honesty. With outstanding communication skills, we coordinate the various trades, and assure the project meets the goals of on-time delivery, expected quality, and committed budget.

"Francis is very good! Polite, professional, considerate, and offers quality service!"

Juan S on April 2023


Cal Construction Services LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Cal Construction Services LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
26 years of experience
Free onsite estimate

We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!


Avatar for HM Construction & Painting

HM Construction & Painting

4.76(
137
)
Approved Pro

HM Construction & Painting

4.76(
137
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
70 local quotes requested

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


Avatar for BnB Enterprises

BnB Enterprises

5.00(
2
)
Approved Pro

BnB Enterprises

5.00(
2
)
Approved Pro
6 years of experience

We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a locally owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today, and we look forward to working with you!

"BNB Enterprises were very professional and efficient. I was able to get a free quote within days and they started the job within a week. I needed my rental unit floors to be sanded and stained and they came out beautifully. They also were able to repair one of my Second floor bedroom windows. This is my second time hiring this contractor and I am more than happy with their workmanship. They are definitely my go to contractor."

Aundrea H on December 2025

We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a locally owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today, and we look forward to working with you!

"BNB Enterprises were very professional and efficient. I was able to get a free quote within days and they started the job within a week. I needed my rental unit floors to be sanded and stained and they came out beautifully. They also were able to repair one of my Second floor bedroom windows. This is my second time hiring this contractor and I am more than happy with their workmanship. They are definitely my go to contractor."

Aundrea H on December 2025


Avatar for Henrys Construction & Remodeling LLC

Henrys Construction & Remodeling LLC

4.83(
24
)
Approved Pro

Henrys Construction & Remodeling LLC

4.83(
24
)
Approved Pro
Customers say: Quick response
10 years of experience
Free onsite estimate

We understand that construction is more than simply following drawings and making sure a structure is up to code. It's about making your vision come to life. This means that details are as important as the end result, the way joints are placed together, the careful installation of materials to showcase their beauty, the final brush stroke that finishes a project. From concept to completion, we take the time to make sure each milestone is met with the highest level of craftsmanship and professionalism. We stand behind our work, warranty every job, and make sure our clients are involved every step of the way.

"I had my roof replaced by Julia and her team at Henry’s Roofing & Siding, and I'm thrilled with the results. Julia's quick responses and competitive quote gave me confidence and they did a fantastic job replacing the roof, and their attention to detail was spot-on. Clean-up was thorough. I highly recommend Henry’s Roofing & Siding. Their affordability, top-notch work, and excellent communication make them a great choice. I'm delighted with their work and grateful for their service"

Juliet A on November 2023

We understand that construction is more than simply following drawings and making sure a structure is up to code. It's about making your vision come to life. This means that details are as important as the end result, the way joints are placed together, the careful installation of materials to showcase their beauty, the final brush stroke that finishes a project. From concept to completion, we take the time to make sure each milestone is met with the highest level of craftsmanship and professionalism. We stand behind our work, warranty every job, and make sure our clients are involved every step of the way.

"I had my roof replaced by Julia and her team at Henry’s Roofing & Siding, and I'm thrilled with the results. Julia's quick responses and competitive quote gave me confidence and they did a fantastic job replacing the roof, and their attention to detail was spot-on. Clean-up was thorough. I highly recommend Henry’s Roofing & Siding. Their affordability, top-notch work, and excellent communication make them a great choice. I'm delighted with their work and grateful for their service"

Juliet A on November 2023


J & P Restoration

4.62(
59
)
Approved Pro

J & P Restoration

4.62(
59
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
19 local quotes requested

With over 33 years experience in residential home improvement projects, J & P Restoration has the knowledge and experience to make your Addition, remodel or other project a reality.

"The owner, John Petrillo, is an old-school pro. This was an insurance claim job, but we hope to hire him again this year for another large (non-insurance claim) project."

Theresa M on May 2023

With over 33 years experience in residential home improvement projects, J & P Restoration has the knowledge and experience to make your Addition, remodel or other project a reality.

"The owner, John Petrillo, is an old-school pro. This was an insurance claim job, but we hope to hire him again this year for another large (non-insurance claim) project."

Theresa M on May 2023


Avatar for AN Pamir INC

AN Pamir INC

5.00(
5
)
Approved Pro

AN Pamir INC

5.00(
5
)
Approved Pro
2 years of experience
Free onsite estimate

is committed to excellence in 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 customer's interests, and make their concerns the basis of our business.

"helped me with cleaning up my kitchen, redoing the slabs and flooring !"

saiffy y on October 2025

is committed to excellence in 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 customer's interests, and make their concerns the basis of our business.

"helped me with cleaning up my kitchen, redoing the slabs and flooring !"

saiffy y on October 2025


Avatar for Everything Under The Roof LLC

Everything Under The Roof LLC

4.95(
37
)
Approved Pro

Everything Under The Roof LLC

4.95(
37
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
20 years of experience

We pride ourselves on being a unique construction company. Everything Under the Roof is an interior, residential construction company owned by Kim and Jay Spanier. At work we are a husband and wife team, but at home we are mom and dad, so we truly understand the importance of keeping your project orderly and on time, while keeping your family (including your pets) safe. We can also guarantee NO high pressure sales calls, and no crabby, condescending construction guys working on your home improvement project – just our family helping yours! Kim is your main point of contact through the project. She walks you through the construction process, acts as your personal construction jargon translator, and, most importantly, she is the budget master. Kim will help you shop for materials so that you stay on budget. Jay is the jobsite superintendent. He manages the day to day activities of your remodeling/construction project, he coordinates and manages the sub-contractors, and it’s his skillful carpentry that will transform your home. All of our projects work within the existing footprint of your house. What exactly does that mean? Well, in a nut shell, we don’t do additions, and we won’t raise your roof. We find all the hidden, un-used spaces in your house and re-create your floor plan to work for you and your family.

"My wife and I needed to finish our basement to accommodate our growing kids. We had an excellent experience with Everything Under The Roof. They really listened to what we wanted to build and everything was done well, on-time, and on-budget. One thing I particularly appreciated is that the owner was onsite doing the work, and not simply sending a team of workers. We'll definitely be using Everything Under The Roof for any future projects. "

Thomas H on September 2025

We pride ourselves on being a unique construction company. Everything Under the Roof is an interior, residential construction company owned by Kim and Jay Spanier. At work we are a husband and wife team, but at home we are mom and dad, so we truly understand the importance of keeping your project orderly and on time, while keeping your family (including your pets) safe. We can also guarantee NO high pressure sales calls, and no crabby, condescending construction guys working on your home improvement project – just our family helping yours! Kim is your main point of contact through the project. She walks you through the construction process, acts as your personal construction jargon translator, and, most importantly, she is the budget master. Kim will help you shop for materials so that you stay on budget. Jay is the jobsite superintendent. He manages the day to day activities of your remodeling/construction project, he coordinates and manages the sub-contractors, and it’s his skillful carpentry that will transform your home. All of our projects work within the existing footprint of your house. What exactly does that mean? Well, in a nut shell, we don’t do additions, and we won’t raise your roof. We find all the hidden, un-used spaces in your house and re-create your floor plan to work for you and your family.

"My wife and I needed to finish our basement to accommodate our growing kids. We had an excellent experience with Everything Under The Roof. They really listened to what we wanted to build and everything was done well, on-time, and on-budget. One thing I particularly appreciated is that the owner was onsite doing the work, and not simply sending a team of workers. We'll definitely be using Everything Under The Roof for any future projects. "

Thomas H on September 2025


Avatar for FS Sanchez Landscaping LLC

FS Sanchez Landscaping LLC

4.78(
9
)
Approved Pro

FS Sanchez Landscaping LLC

4.78(
9
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
26 years of experience

We are a small, family owned operated full service landscaping company. Aside from all of your landscaping needs, we also specialize in, hardscaping, rock walls, paver and concrete patios, decks, new driveway construction and more! We have the experience and dedication to bring your dreams to reality! We guarantee your satisfaction, and we won’t leave until the job is done right. Call or click to schedule a free estimate today! We carry a home improvement license and we are fully insured.

"Job done well, on time."

Frank R on March 2024

We are a small, family owned operated full service landscaping company. Aside from all of your landscaping needs, we also specialize in, hardscaping, rock walls, paver and concrete patios, decks, new driveway construction and more! We have the experience and dedication to bring your dreams to reality! We guarantee your satisfaction, and we won’t leave until the job is done right. Call or click to schedule a free estimate today! We carry a home improvement license and we are fully insured.

"Job done well, on time."

Frank R on March 2024

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

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Oakville, 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.