Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Portland, OR

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Addition to existing structure builders in Portland

Avatar for Westward Renovation LLC

Westward Renovation LLC

4.50(
8
)
Approved Pro

Westward Renovation LLC

4.50(
8
)
Approved Pro
Customers say: Quick response
35 local quotes requested
11 years of experience

Our processes are tailored to meet the unique demands of each individual project. Happy clients are the most rewarding part of this work and our goal is to make the construction experience as enjoyable as the final product.  At Westward Renovation we promise to arrive on time, communicate clearly and honestly, treat you and your home with respect, provide a realistic schedule, complete the work on time, and leave your home cleaner than when we arrived with our professional final clean service. Only after we fully understand the vision and goals for your project will we provide you with a detailed custom proposal to bring your dream space to reality. We only partner with professionals that share our commitment to quality and service and that keeps us a step above the competition. We look forward to earning your business!

"Working with Westward Renovations was such a joy. I met with 8 contracting companies and I chose them because Logan saw my vision and told he could make it happen. My project started in September and they were done within 3 months. I am so glad that I went with them. They made my dream come true. What an awesome team. I will definitely recommend them for future home projects. "

Cady M on December 2025

Our processes are tailored to meet the unique demands of each individual project. Happy clients are the most rewarding part of this work and our goal is to make the construction experience as enjoyable as the final product.  At Westward Renovation we promise to arrive on time, communicate clearly and honestly, treat you and your home with respect, provide a realistic schedule, complete the work on time, and leave your home cleaner than when we arrived with our professional final clean service. Only after we fully understand the vision and goals for your project will we provide you with a detailed custom proposal to bring your dream space to reality. We only partner with professionals that share our commitment to quality and service and that keeps us a step above the competition. We look forward to earning your business!

"Working with Westward Renovations was such a joy. I met with 8 contracting companies and I chose them because Logan saw my vision and told he could make it happen. My project started in September and they were done within 3 months. I am so glad that I went with them. They made my dream come true. What an awesome team. I will definitely recommend them for future home projects. "

Cady M on December 2025


Avatar for 2 Contractors, LLC

2 Contractors, LLC

5.00(
8
)
Approved Pro

2 Contractors, LLC

5.00(
8
)
Approved Pro
15 years of experience
Free onsite estimate

With several years experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. We welcome your questions and thank you for your interest. Call today!

"Augustine was wonderful to work with. He was very professional yet at the same time very personable. "

Elizabeth J on December 2025

With several years experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. We welcome your questions and thank you for your interest. Call today!

"Augustine was wonderful to work with. He was very professional yet at the same time very personable. "

Elizabeth J on December 2025


Avatar for R3J Residential Services

R3J Residential Services

4.98(
64
)
Approved Pro

R3J Residential Services

4.98(
64
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
10 local quotes requested

Empowering homeowners to reimagine their living spaces with creativity, care, and a commitment to crafting environments that inspire joy and connection. We make it our job to listen as well as offer expert advice and ideas to help design the project of your dreams and not our own. Here at R3J Residential Services, we are client-oriented and pride ourselves on quality craftsmanship and earning your trust. We believe that it takes teamwork, and you, as our customer, are an integral part of that team. We prefer to provide value and build relationships, not just have transactions. Whether your project is a complete overhaul or area specific we will assist you in making the best possible choices for the best possible result. Your Improved Quality of Life Is Our Ultimate Goal

"Ron and his crew were great They showed up on time every day and performed the work in a professional manner. Ron is honest and trustworthy. He helped us plan the project, guided us through the process, and was quick to respond when we had questions. We wouldn't hesitate to hire him again."

Richard O on September 2023

Empowering homeowners to reimagine their living spaces with creativity, care, and a commitment to crafting environments that inspire joy and connection. We make it our job to listen as well as offer expert advice and ideas to help design the project of your dreams and not our own. Here at R3J Residential Services, we are client-oriented and pride ourselves on quality craftsmanship and earning your trust. We believe that it takes teamwork, and you, as our customer, are an integral part of that team. We prefer to provide value and build relationships, not just have transactions. Whether your project is a complete overhaul or area specific we will assist you in making the best possible choices for the best possible result. Your Improved Quality of Life Is Our Ultimate Goal

"Ron and his crew were great They showed up on time every day and performed the work in a professional manner. Ron is honest and trustworthy. He helped us plan the project, guided us through the process, and was quick to respond when we had questions. We wouldn't hesitate to hire him again."

Richard O on September 2023


Avatar for IN YOUR HOME

IN YOUR HOME

4.85(
380
)
Approved Pro

IN YOUR HOME

4.85(
380
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
61 local quotes requested

In Your Home was founded in 2003 with the goal of creating more beautiful, safer home environments that support people of all abilities. Our clients come from all walks of life and turn to us for our creative ideas and superior service quality. We specialize in: Universal design, Aging-in-place, Homes for multi-generational families, Accessibility enhancement, Small home repairs. Most work done by our own employees, we use license sub-contractors for electrical and plumbing work when needed. Award winning service and value. License OR CCB# 157737; WA YOUR*933KQ.

"We hired In Your Home for a laundry room / mudroom reconfiguration / reno and they did a terrific job! I love that they are a small, locally-owned company, specializing in ADA renovations for the elderly and disabled. Everyone who works for IYH is very attentive and accessible. Time from demo to completion was 3 weeks. Had a great experience working with Kristen (consultant / designer), Lee (project manager), and Israel (demo, framing, drywall, flooring, etc.) Electrician, plumber, and cabinet maker were contractors. We had a few small hiccups along the way (as always happens with a remodel) but staff were very prompt and courteous to resolve them. They hire quality people and take pride in what they do. Would definitely recommend!"

Molly F on November 2025

In Your Home was founded in 2003 with the goal of creating more beautiful, safer home environments that support people of all abilities. Our clients come from all walks of life and turn to us for our creative ideas and superior service quality. We specialize in: Universal design, Aging-in-place, Homes for multi-generational families, Accessibility enhancement, Small home repairs. Most work done by our own employees, we use license sub-contractors for electrical and plumbing work when needed. Award winning service and value. License OR CCB# 157737; WA YOUR*933KQ.

"We hired In Your Home for a laundry room / mudroom reconfiguration / reno and they did a terrific job! I love that they are a small, locally-owned company, specializing in ADA renovations for the elderly and disabled. Everyone who works for IYH is very attentive and accessible. Time from demo to completion was 3 weeks. Had a great experience working with Kristen (consultant / designer), Lee (project manager), and Israel (demo, framing, drywall, flooring, etc.) Electrician, plumber, and cabinet maker were contractors. We had a few small hiccups along the way (as always happens with a remodel) but staff were very prompt and courteous to resolve them. They hire quality people and take pride in what they do. Would definitely recommend!"

Molly F on November 2025


"Started out well. Job started earlier than originally planned which was fine. Paid a third down to start job with understanding that rest would be paid in full upon completion. Everything was going fine until near the end of the job. After shower fixtures were installed I noticed they were the wrong finish from what we agreed on for the estimate. Took a week for Joel to reorder & replace. When the frameless glass shower panel was going in, the installer realized it was the wrong size, and had to be redone. The grout on the stone shower floor was very sloppily applied. Bits of dried grit are stuck on the stones. Before job was finished Joel was asking for full payment as he was running tight of money. I insisted on paying him in full only when job was complete. He wasn't very happy. Overall, the tile shower walls & bathroom floor tile look great. I only wish there had been more attention paid to the other details."

Kathy J on October 2022

Looking to remodel your kitchen or bathroom? Look no further than 5 Star Home Renovations LLC. With over 15 years of experience in bathroom remodeling, we are your go-to experts. Contact us today for a free estimate!

"Started out well. Job started earlier than originally planned which was fine. Paid a third down to start job with understanding that rest would be paid in full upon completion. Everything was going fine until near the end of the job. After shower fixtures were installed I noticed they were the wrong finish from what we agreed on for the estimate. Took a week for Joel to reorder & replace. When the frameless glass shower panel was going in, the installer realized it was the wrong size, and had to be redone. The grout on the stone shower floor was very sloppily applied. Bits of dried grit are stuck on the stones. Before job was finished Joel was asking for full payment as he was running tight of money. I insisted on paying him in full only when job was complete. He wasn't very happy. Overall, the tile shower walls & bathroom floor tile look great. I only wish there had been more attention paid to the other details."

Kathy J on October 2022


NW Craft Construction, LLC

5.00(
2
)
Approved Pro

NW Craft Construction, LLC

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
15 years of experience

NW Craft Construction LLC is the premier home improvement company serving Lake Oswego and West Linn for over 12 years. Our #1 goal as a company is having complete customer satisfaction and there is no job that is too big or too small. If you want the job done right, call Scott today for a FREE estimate.

"He was great! Has great prices all around and does high quality work"

Brian B on November 2021

NW Craft Construction LLC is the premier home improvement company serving Lake Oswego and West Linn for over 12 years. Our #1 goal as a company is having complete customer satisfaction and there is no job that is too big or too small. If you want the job done right, call Scott today for a FREE estimate.

"He was great! Has great prices all around and does high quality work"

Brian B on November 2021


Avatar for F.J.S. Construction

F.J.S. Construction

4.90(
5
)
Approved Pro

F.J.S. Construction

4.90(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
19 years of experience

I moved from a farm into a new house in a small town. They built four more homes next to our house and I told my parents I want to do that when I grow up. For the last 33 years I’ve been doing just that . I guess you can say “ I’m living my dream “. I do my best to listen to my clients and help them with the vision they gave for their. Communication from start to finish.

"I would highly recommend them!"

Jim H on March 2023

I moved from a farm into a new house in a small town. They built four more homes next to our house and I told my parents I want to do that when I grow up. For the last 33 years I’ve been doing just that . I guess you can say “ I’m living my dream “. I do my best to listen to my clients and help them with the vision they gave for their. Communication from start to finish.

"I would highly recommend them!"

Jim H on March 2023


Avatar for MHM Construction, LLC

MHM Construction, LLC

5.00(
3
)
Approved Pro

MHM Construction, LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
5 years of experience

We are a locally owned and operated company. We value honesty and integrity in all aspects of our business. We offer a variety of home improvement services that are customized to each individual project. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"They were very easy to work with and very kind I got exactly what I asked for. They pay close attention to detail. Theyâ  re very clean and thorough! They do everything to please the client"

Luis S on June 2023

We are a locally owned and operated company. We value honesty and integrity in all aspects of our business. We offer a variety of home improvement services that are customized to each individual project. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"They were very easy to work with and very kind I got exactly what I asked for. They pay close attention to detail. Theyâ  re very clean and thorough! They do everything to please the client"

Luis S on June 2023


Avatar for RC Construction & Remodeling, LLC

RC Construction & Remodeling, LLC

5.00(
12
)
Approved Pro

RC Construction & Remodeling, LLC

5.00(
12
)
Approved Pro
2 years of experience
Free onsite estimate

We are 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 customers' interests and make their concerns the basis of our business.

"I have used Luis (RLCC) for many projects in 2 homes. And recommended him to countless others. He has done a complete re-siding & exterior painting on my 1924 bungalow. He has added a bedroom with egress window to my basement. He built a small kitchen for my MIL unit. Finished and walled in a new bedroom in an upstairs space. And many”little” things- bathroom refresh with new floor tile & paint. Installing new hardwood. Installing new light fixtures and interior painting. I trust Luis with any project big or small. He is FAST, timely (meaning on time every morning), prepared and cleans up at the end of each day. He’s knowledgeable & a good carpenter. He knows how to schedule and manage a crew. I love Luis! "

Liberty W on September 2025

We are 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 customers' interests and make their concerns the basis of our business.

"I have used Luis (RLCC) for many projects in 2 homes. And recommended him to countless others. He has done a complete re-siding & exterior painting on my 1924 bungalow. He has added a bedroom with egress window to my basement. He built a small kitchen for my MIL unit. Finished and walled in a new bedroom in an upstairs space. And many”little” things- bathroom refresh with new floor tile & paint. Installing new hardwood. Installing new light fixtures and interior painting. I trust Luis with any project big or small. He is FAST, timely (meaning on time every morning), prepared and cleans up at the end of each day. He’s knowledgeable & a good carpenter. He knows how to schedule and manage a crew. I love Luis! "

Liberty W on September 2025


Avatar for Archer Construction and Remodel LLC

Archer Construction and Remodel LLC

5.00(
1
)
Approved Pro

Archer Construction and Remodel LLC

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

Archer Construction and Remodel LLC 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 customers' interests and make their concerns the basis of our business.

"Chris and Chris were great. I had a complete kitchen remodel down to studs, lots of rot. New cabinets , paint , counters and floors . They were upfront about the total cost from ghe start and all of their work was very good. They worked around my work schedule. Love my new kitchen."

Delaina A on March 2025

Archer Construction and Remodel LLC 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 customers' interests and make their concerns the basis of our business.

"Chris and Chris were great. I had a complete kitchen remodel down to studs, lots of rot. New cabinets , paint , counters and floors . They were upfront about the total cost from ghe start and all of their work was very good. They worked around my work schedule. Love my new kitchen."

Delaina A on March 2025

...
Showing 1-10 of 1063
FAQs for addition to existing structure building service projects in Portland, OR

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 Portland, OR 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.