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Find Addition to existing structure builders in Portland

"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 J & M HOME AND GARDEN SOLUTIONS LLC

J & M HOME AND GARDEN SOLUTIONS LLC

325 SW 27TH WAY
5.00(
1
)
Approved Pro

J & M HOME AND GARDEN SOLUTIONS LLC

325 SW 27TH WAY
5.00(
1
)
Approved Pro
5 years of experience
Free onsite estimate

J&M Home and Garden Solutions 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.

"We had windows resized and replaced. One of our exterior walls had to be rebuilt. The J and M crew were very professional and courteous. The cost of the remodel was very reasonable. We will definitely call them for our next project!!!"

J M on August 2025

J&M Home and Garden Solutions 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.

"We had windows resized and replaced. One of our exterior walls had to be rebuilt. The J and M crew were very professional and courteous. The cost of the remodel was very reasonable. We will definitely call them for our next project!!!"

J M on August 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


Avatar for Archer Construction and Remodel LLC

Archer Construction and Remodel LLC

4717 Whitman Cir NE
5.00(
1
)
Approved Pro

Archer Construction and Remodel LLC

4717 Whitman Cir NE
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


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 Carp Contracting LLC

Carp Contracting LLC

31405 SW Kensington Dr.
5.00(
4
)
Approved Pro

Carp Contracting LLC

31405 SW Kensington Dr.
5.00(
4
)
Approved Pro
1 years of experience
Free onsite estimate

We’re a family-owned and operated contracting company specializing in residential design, remodeling, renovations, and additions. With a focus on quality craftsmanship and personalized service, we work closely with each homeowner to bring their vision to life. Our in-house design team provides detailed drawings and renderings to help you plan with confidence, while our hands-on approach ensures every detail is done right. Whether you’re updating a single space or transforming your entire home, we’re committed to delivering results that are built to last—and built around you. Contact us today!

"We hired Carp Contracting for a home refresh and we couldn’t be happier with the results. The team was delightful, professional, and we look forward to working with them again. They helped finalize our vision with thoughtful suggestions, high quality craftsmanship, and attention to detail. The project stayed on schedule, and the site was kept clean and organized. You can tell they care about the quality of their work. I highly recommend Carp Contracting to anyone looking for reliable and high-quality work!"

CM D on May 2025

We’re a family-owned and operated contracting company specializing in residential design, remodeling, renovations, and additions. With a focus on quality craftsmanship and personalized service, we work closely with each homeowner to bring their vision to life. Our in-house design team provides detailed drawings and renderings to help you plan with confidence, while our hands-on approach ensures every detail is done right. Whether you’re updating a single space or transforming your entire home, we’re committed to delivering results that are built to last—and built around you. Contact us today!

"We hired Carp Contracting for a home refresh and we couldn’t be happier with the results. The team was delightful, professional, and we look forward to working with them again. They helped finalize our vision with thoughtful suggestions, high quality craftsmanship, and attention to detail. The project stayed on schedule, and the site was kept clean and organized. You can tell they care about the quality of their work. I highly recommend Carp Contracting to anyone looking for reliable and high-quality work!"

CM D on May 2025


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
857 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 Sewell Built LLC

Sewell Built LLC

325 Northeast 18th Street
4.56(
9
)
Approved Pro

Sewell Built LLC

325 Northeast 18th Street
4.56(
9
)
Approved Pro
85 local quotes requested
Free onsite estimate

Looking for top-notch fencing services? Look no further! At Sewell Built LLC, we specialize in providing high-quality fencing solutions for homeowners. Our team of experts is dedicated to delivering exceptional craftsmanship and customer satisfaction. Contact us today for all your fencing needs!

"Grayson was very knowledgeable and kind. He communicated well throughout the whole process and we love our new fence! Would highly recommend him to anyone."

garrett l on April 2025

Looking for top-notch fencing services? Look no further! At Sewell Built LLC, we specialize in providing high-quality fencing solutions for homeowners. Our team of experts is dedicated to delivering exceptional craftsmanship and customer satisfaction. Contact us today for all your fencing needs!

"Grayson was very knowledgeable and kind. He communicated well throughout the whole process and we love our new fence! Would highly recommend him to anyone."

garrett l on April 2025

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

  • 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.