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.

Addition to existing structure builders in Portland

"I have used Jay for indoor remodeling and deck rebuilding. I have been totally satisfied with the quality of his work. I have found him to be skilled, dependable, and highly reliable. He does great work."

Patricia L on October 2013

General contracting firm specializing in residential and small commercial remodeling, additions, ADU's, & new homes.

"I have used Jay for indoor remodeling and deck rebuilding. I have been totally satisfied with the quality of his work. I have found him to be skilled, dependable, and highly reliable. He does great work."

Patricia L on October 2013


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


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 Colbyco Custom Construction, LLC

Colbyco Custom Construction, LLC

12042 Southeast Sunnyside Road, Box 352
3.67(
3
)
Approved Pro

Colbyco Custom Construction, LLC

12042 Southeast Sunnyside Road, Box 352
3.67(
3
)
Approved Pro
15 years of experience
Free onsite estimate

Colbyco Custom Construction, the father son team that you want for your custom build. Over 35 years of expertise in construction specializing in additions and custom built and spec homes. Our quality service and keen eye for detail provides outstanding results. Let our team build your dreams with our in-house designers we bring your dreams to life. Call Colbyco Custom Construction, LLC, today for your professional consultation.

"I have delt with a lot of bad contractors in my life and Colbyco is the absolute worst! The communication between father and son was horrible. I was supposed to work with the father and he didn't share with the son what I wanted to happen. He lives on the other side of the state and was trying to direct the project from there which was a joke. Everything that could go wrong did go wrong and two years later I'm still living with the horrible work that they did. If you don't have any idea about what you want and leave everything in their hands then fine, but if you want something custom, to your own specifications, forget it. They will do whatever they want and won't fix it later. Run, Run, Run away from this company!"

Bonnie W on September 2024

Colbyco Custom Construction, the father son team that you want for your custom build. Over 35 years of expertise in construction specializing in additions and custom built and spec homes. Our quality service and keen eye for detail provides outstanding results. Let our team build your dreams with our in-house designers we bring your dreams to life. Call Colbyco Custom Construction, LLC, today for your professional consultation.

"I have delt with a lot of bad contractors in my life and Colbyco is the absolute worst! The communication between father and son was horrible. I was supposed to work with the father and he didn't share with the son what I wanted to happen. He lives on the other side of the state and was trying to direct the project from there which was a joke. Everything that could go wrong did go wrong and two years later I'm still living with the horrible work that they did. If you don't have any idea about what you want and leave everything in their hands then fine, but if you want something custom, to your own specifications, forget it. They will do whatever they want and won't fix it later. Run, Run, Run away from this company!"

Bonnie W on September 2024


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 Continuum Design Build LLC

Continuum Design Build LLC

1827 NE Multnomah St
5.00(
7
)
Approved Pro

Continuum Design Build LLC

1827 NE Multnomah St
5.00(
7
)
Approved Pro
Customers say: Quick response
23 years of experience
Free onsite estimate

At Continuum Design Build, we offer personalized, hands-on guidance through every stage of your project, from the first spark of an idea to the final transformation. Our process ensures a seamless journey from concept to creation, with detailed designs that bring your vision to life. From exploring showrooms to selecting finishes, we work exclusively with trusted, reputable suppliers. This ensures that every decision you make is informed, with complete confidence and no unexpected surprises.

"I hired Geoffrey and his crew for an office buildout in a commercial building. I’m extremely happy with final product! I can’t say enough positive things about continuum design and build, they were professional timely and artistic. Michelle, the designer was budget friendly and helped me execute my vision. Fair price and trust worthy. Would hire again in a heartbeat."

Zander K on April 2025

At Continuum Design Build, we offer personalized, hands-on guidance through every stage of your project, from the first spark of an idea to the final transformation. Our process ensures a seamless journey from concept to creation, with detailed designs that bring your vision to life. From exploring showrooms to selecting finishes, we work exclusively with trusted, reputable suppliers. This ensures that every decision you make is informed, with complete confidence and no unexpected surprises.

"I hired Geoffrey and his crew for an office buildout in a commercial building. I’m extremely happy with final product! I can’t say enough positive things about continuum design and build, they were professional timely and artistic. Michelle, the designer was budget friendly and helped me execute my vision. Fair price and trust worthy. Would hire again in a heartbeat."

Zander K on April 2025


Avatar for KOLT CONSTRUCTION LLC

KOLT CONSTRUCTION LLC

11265 SE 30th Ave
5.00(
9
)
Approved Pro

KOLT CONSTRUCTION LLC

11265 SE 30th Ave
5.00(
9
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

Kolt Construction 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.

"Amazingly therl and timely work"

Tre A on February 2024

Kolt Construction 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.

"Amazingly therl and timely work"

Tre A on February 2024


Avatar for Redeemed Construction, Corp.

Redeemed Construction, Corp.

12607 Northeast 9th Street
4.83(
3
)
Approved Pro

Redeemed Construction, Corp.

12607 Northeast 9th Street
4.83(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

At Redeemed Construction, we are dedicated to delivering excellence in every project we undertake. We adhere to the highest standards of integrity, fairness, honesty, and personal responsibility. Our distinction lies in the superior quality of service we provide to our clients. Our profound knowledge of the trade, coupled with our unmatched skillset, defines us as true professionals. Above all, we prioritize our customers' interests, ensuring that their concerns are at the heart of our business. Contact us today and experience the Redeemed Construction difference! 503-880-2764

"I am the manager of a self storage facility and the guys from Redeemed Construction, were very professional, always showed up on time, have great customer service and were a pleasure to work with. I will hire them again, when I need work done."

Elizabeth J on October 2023

At Redeemed Construction, we are dedicated to delivering excellence in every project we undertake. We adhere to the highest standards of integrity, fairness, honesty, and personal responsibility. Our distinction lies in the superior quality of service we provide to our clients. Our profound knowledge of the trade, coupled with our unmatched skillset, defines us as true professionals. Above all, we prioritize our customers' interests, ensuring that their concerns are at the heart of our business. Contact us today and experience the Redeemed Construction difference! 503-880-2764

"I am the manager of a self storage facility and the guys from Redeemed Construction, were very professional, always showed up on time, have great customer service and were a pleasure to work with. I will hire them again, when I need work done."

Elizabeth J on October 2023


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

...
Showing 1-10 of 969
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.