Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Lake Oswego, 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 Lake Oswego

Avatar for All About Decks & More, LLC

All About Decks & More, LLC

PO Box 85
4.50(
16
)
•Approved Pro

All About Decks & More, LLC

PO Box 85
4.50(
16
)
•Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
18 years of experience

All About Decks, Docks & More, LLC, is a small company that will work with you every step of the way giving you the customer service that you deserve. Please call for your fair and honest estimate

"Only thing they did themselves was the patio ceiling & French drain for my project. Acted as hiring contractor for all the other work. Overall project was a success, but I didn't appreciate how the lead crewman/ owner spoke to his employee. Subcontractors that were hired were excellent."

Kristi P on September 2022

All About Decks, Docks & More, LLC, is a small company that will work with you every step of the way giving you the customer service that you deserve. Please call for your fair and honest estimate

"Only thing they did themselves was the patio ceiling & French drain for my project. Acted as hiring contractor for all the other work. Overall project was a success, but I didn't appreciate how the lead crewman/ owner spoke to his employee. Subcontractors that were hired were excellent."

Kristi P on September 2022

Avatar for Backyard Blueprint

Backyard Blueprint

5.00(
1
)
•Approved Pro

Backyard Blueprint

5.00(
1
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
26 local quotes requested

Backyard Blueprint is a family-owned business established in Portland OR. We’ve been in the Portland area for 30 years. The challenge of keeping our family close, both aging parents and our young adult children, is an experience we’re familiar with ourselves. Our in-house construction team has worked in Portland and surrounding areas for the past 20 years. They’ve delivered hundreds of single-family and multi-generational housing options to the community. We have partnerships within nearly every trade in the market. We’re proud members of the Home Building Association of Greater Portland and the National Association of Home Builders. Our team is diverse and determined, and we believe in the value of continuous learning. We enjoy engaging with our prospective customers to understand your reasons for considering an ADU for your property. We believe what separates us as a company is the humility our team offers. We are just like you. We strive to fully understand your circumstances, and tailor our expertise specifically for you and your family’s needs. Contact us today for your FREE estimate!

"Matthew Bruce exceeded our expectations. Our 92-year-old dad fell while using the bathroom and injured himself. We needed an immediate response to make the bathroom safe. Matthew responded to my request very quickly. He asked questions about the situation that showed he had the expertise we needed. He came to the house within a day of agreeing to perform the work and completed the most urgent task that day. He needed other tools to complete the installation of the grab bar drilled into the shower tiles, so he had to return at a later time. He communicated clearly when he could return and completed the task. Additionally, he cleaned up after his work and was pleasant to workMatthew Bruce exceeded our expectations. Our 92-year-old dad fell while using the bathroom and injured himself, so we needed an immediate response to make the bathroom safe. Matthew quickly responded to my request, asking detailed questions that demonstrated his expertise. He came to our house within a day of agreeing to do the work and completed the most urgent task that same day. To install a grab bar drilled into the shower tiles, he needed additional tools, so he had to return later to finish the job. He communicated clearly about when he could come back and completed the task efficiently. Furthermore, he cleaned up after his work and was pleasant to work with. with."

Sandra M on September 2025

Backyard Blueprint is a family-owned business established in Portland OR. We’ve been in the Portland area for 30 years. The challenge of keeping our family close, both aging parents and our young adult children, is an experience we’re familiar with ourselves. Our in-house construction team has worked in Portland and surrounding areas for the past 20 years. They’ve delivered hundreds of single-family and multi-generational housing options to the community. We have partnerships within nearly every trade in the market. We’re proud members of the Home Building Association of Greater Portland and the National Association of Home Builders. Our team is diverse and determined, and we believe in the value of continuous learning. We enjoy engaging with our prospective customers to understand your reasons for considering an ADU for your property. We believe what separates us as a company is the humility our team offers. We are just like you. We strive to fully understand your circumstances, and tailor our expertise specifically for you and your family’s needs. Contact us today for your FREE estimate!

"Matthew Bruce exceeded our expectations. Our 92-year-old dad fell while using the bathroom and injured himself. We needed an immediate response to make the bathroom safe. Matthew responded to my request very quickly. He asked questions about the situation that showed he had the expertise we needed. He came to the house within a day of agreeing to perform the work and completed the most urgent task that day. He needed other tools to complete the installation of the grab bar drilled into the shower tiles, so he had to return at a later time. He communicated clearly when he could return and completed the task. Additionally, he cleaned up after his work and was pleasant to workMatthew Bruce exceeded our expectations. Our 92-year-old dad fell while using the bathroom and injured himself, so we needed an immediate response to make the bathroom safe. Matthew quickly responded to my request, asking detailed questions that demonstrated his expertise. He came to our house within a day of agreeing to do the work and completed the most urgent task that same day. To install a grab bar drilled into the shower tiles, he needed additional tools, so he had to return later to finish the job. He communicated clearly about when he could come back and completed the task efficiently. Furthermore, he cleaned up after his work and was pleasant to work with. with."

Sandra M on September 2025

NW Craft Construction, LLC

446 Linvingood Lane
5.00(
2
)
•Approved Pro

NW Craft Construction, LLC

446 Linvingood Lane
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

4532 SE 73rd Ave Unit A
4.90(
5
)
•Approved Pro

F.J.S. Construction

4532 SE 73rd Ave Unit A
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

146 DRAPER STREET Ne
5.00(
3
)
•Approved Pro

MHM Construction, LLC

146 DRAPER STREET Ne
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

Grit Builders, LLC

17120 Northwest Joscelyn
5.00(
8
)
•Approved Pro

Grit Builders, LLC

17120 Northwest Joscelyn
5.00(
8
)
•Approved Pro
Customers say: Quick response
29 years of experience
Free onsite estimate

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 Bathroom , Kitchen Remodels and Home Additions 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!

"Cannot impress how much we enjoyed working with Matt and his team. I'm a realtor and know a lot of contractors and can truly say Matt went above and beyond! We had him do two baths and some "extras" and are not only thrilled with the result, but he came in under budget! If you want to work with someone with integrity and a passion for making his clients happy, then Matt is your guy! "

Nan K on February 2025

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 Bathroom , Kitchen Remodels and Home Additions 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!

"Cannot impress how much we enjoyed working with Matt and his team. I'm a realtor and know a lot of contractors and can truly say Matt went above and beyond! We had him do two baths and some "extras" and are not only thrilled with the result, but he came in under budget! If you want to work with someone with integrity and a passion for making his clients happy, then Matt is your guy! "

Nan K on February 2025

Avatar for McFadin Design/Build LLC

McFadin Design/Build LLC

2112 NE Wygant Street
5.00(
3
)
•Approved Pro

McFadin Design/Build LLC

2112 NE Wygant Street
5.00(
3
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
25 years of experience

We are a small, family oriented, second generation design/ build firm located in NE Portland. We believe the simplest solutions to problems are usually the best. We operate in and foster an environment of mutual respect. Respect for each other, for our clients, and for the the world we live in. We are here for a simple reason: To do good work.

"Nice guy and easy to work with. Came up with different ideas, and saved me money. Very professional, available, responsible, and reliable. Did the job in a timely manner, and absolutely finished it when he was supposed to."

Sonia F on December 2020

We are a small, family oriented, second generation design/ build firm located in NE Portland. We believe the simplest solutions to problems are usually the best. We operate in and foster an environment of mutual respect. Respect for each other, for our clients, and for the the world we live in. We are here for a simple reason: To do good work.

"Nice guy and easy to work with. Came up with different ideas, and saved me money. Very professional, available, responsible, and reliable. Did the job in a timely manner, and absolutely finished it when he was supposed to."

Sonia F on December 2020

Avatar for Elm Construction Services, Inc.

Elm Construction Services, Inc.

6807 NE 79th Ct Ste D
4.50(
6
)
•Approved Pro

Elm Construction Services, Inc.

6807 NE 79th Ct Ste D
4.50(
6
)
•Approved Pro
Customers say: Quick response
865 local quotes requested
10 years of experience

Elm Construction Services INC 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.

"prompt and profes"

Maryann F on September 2023

Elm Construction Services INC 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.

"prompt and profes"

Maryann F on September 2023

Avatar for JPR CONSTRUCTION, INC.

JPR CONSTRUCTION, INC.

14009 SE HAROLD ST
5.00(
3
)
•Approved Pro

JPR CONSTRUCTION, INC.

14009 SE HAROLD ST
5.00(
3
)
•Approved Pro
2 years of experience
Free onsite estimate

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 the start to the 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.

"Excellent work, great customer service, cleaned up every day. Replaced many windows in our large home, found and repaired dry rot areas. Takes great pride in his work."

Sue H on July 2025

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 the start to the 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.

"Excellent work, great customer service, cleaned up every day. Replaced many windows in our large home, found and repaired dry rot areas. Takes great pride in his work."

Sue H on July 2025

Homes With Style, Inc.

.
5.00(
5
)
•Approved Pro

Homes With Style, Inc.

.
5.00(
5
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
35 local quotes requested

At our company, your satisfaction is our top priority. We are committed to completing every job to the highest standards, ensuring exceptional quality and service. Discover our range of services and reach out today to book your free estimate. Let us show you the difference our dedication can make!

"Very well! Joe worked closely with us to satisfy our dream of having our 'East Coast' screened in deck in the PNW. He was transparent about the unknowns and worked hard to find answers and solutions. Although it was a costly project, we are pretty sure the final product costs were significantly lower than our other bid(s). Joe found very high quality sub-contractor workers and negotiated to a favorable price. And, he also held true to his word. Specifically, he made right when property damage occurred (that was a result of unanticipated weather) and honored original estimate costs even when some contractor labor was much more extensive than first anticipated. We are very pleased with our finished covered and screened in deck and would highly recommend Joe as a knowledgeable, trustworthy, fair contractor who communicates well and often."

gandt p on October 2024

At our company, your satisfaction is our top priority. We are committed to completing every job to the highest standards, ensuring exceptional quality and service. Discover our range of services and reach out today to book your free estimate. Let us show you the difference our dedication can make!

"Very well! Joe worked closely with us to satisfy our dream of having our 'East Coast' screened in deck in the PNW. He was transparent about the unknowns and worked hard to find answers and solutions. Although it was a costly project, we are pretty sure the final product costs were significantly lower than our other bid(s). Joe found very high quality sub-contractor workers and negotiated to a favorable price. And, he also held true to his word. Specifically, he made right when property damage occurred (that was a result of unanticipated weather) and honored original estimate costs even when some contractor labor was much more extensive than first anticipated. We are very pleased with our finished covered and screened in deck and would highly recommend Joe as a knowledgeable, trustworthy, fair contractor who communicates well and often."

gandt p on October 2024

...
Showing 1-10 of 998
FAQs for addition to existing structure building service projects in Lake Oswego, OR

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 Lake Oswego, 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.

See all articles
  • 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.