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Find Addition to existing structure builders in Federal Way

Platinum General Construction LLC

5.00(
6
)
Approved Pro

Platinum General Construction LLC

5.00(
6
)
Approved Pro
Customers say: Quick response
10 years of experience
Free onsite estimate

With years in the industry here at Platinum General Construction LLC we pride our company on attention to detail, punctuality, reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. Our attention to detail is that of no other. We look forward to earning your business. Give us a call today!

"Look in pictures for my review "

Alicia G on August 2025

With years in the industry here at Platinum General Construction LLC we pride our company on attention to detail, punctuality, reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. Our attention to detail is that of no other. We look forward to earning your business. Give us a call today!

"Look in pictures for my review "

Alicia G on August 2025


Ace Remodeling, LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Ace Remodeling, LLC

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

ACE REMODELING 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 23 years of industry experience, is what makes us true professionals. Above all, we are mindful of our client's interests, and make their concerns the basis of our business.

ACE REMODELING 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 23 years of industry experience, is what makes us true professionals. Above all, we are mindful of our client's interests, and make their concerns the basis of our business.


Avatar for GreenSun Construction

GreenSun Construction

3.78(
9
)
Approved Pro

GreenSun Construction

3.78(
9
)
Approved Pro
Customers say: Terrific value
44 years of experience
Free onsite estimate

GreenSun Construction offers experience and expertise in providing a custom solution to your building requirements. For thirty years we have concentrated on giving our clients a rewarding experience in building and remodeling with an emphasis on quality and customer satisfaction.

"They did a good job working through unforseen difficulties. We are very pleased with the final project."

Steve F on January 2025

GreenSun Construction offers experience and expertise in providing a custom solution to your building requirements. For thirty years we have concentrated on giving our clients a rewarding experience in building and remodeling with an emphasis on quality and customer satisfaction.

"They did a good job working through unforseen difficulties. We are very pleased with the final project."

Steve F on January 2025


Greg Appert Construction

5.00(
1
)
Approved Pro

Greg Appert Construction

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
30 years of experience

We take great pride in our 5 plus years of experience, expertise, quality, and customer service that we provide to meet the consumer needs. It is our mission to provide excellent quality 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.

"I have been using their services for 10 years, and I greatly appreciate their integrity, trust, dedication, and the quality of their work. I would highly recommend them!"

Glenn B on January 2021

We take great pride in our 5 plus years of experience, expertise, quality, and customer service that we provide to meet the consumer needs. It is our mission to provide excellent quality 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.

"I have been using their services for 10 years, and I greatly appreciate their integrity, trust, dedication, and the quality of their work. I would highly recommend them!"

Glenn B on January 2021


Avatar for Renovate Design/Build

Renovate Design/Build

5.00(
13
)
Approved Pro

Renovate Design/Build

5.00(
13
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
8 years of experience

Renovate Design/Build is a woman-owned family business servicing the Greater Seattle Area. Each person on our team is an integral part of our company's success, providing excellent service and beautifully finished remodel projects for our clients. As a small business, every job is important to our team at Renovate - you are never just a number. Please call us today for a free consultation!

"We worked with Renovate from August 2024 through April 2025. Our experience was exceptional. Ross, Eric, and Jeremiah were efficient and effective, treating our project with great care. The Renovate team stands out in several ways: - Their pricing is transparent. We paid an hourly cost and subcontractor costs, plus a fixed mark-up, which aligned incentives. Amanda provided receipts and timesheets regularly. - They have superb attention to detail. They pointed out issues we might have missed and ensured they were fixed. - They were super responsive, encouraging us to text or email any time and often responding quickly. They kept us updated on the timeline and explained any delays. - They have a strong client focus. They addressed subcontractor errors quickly and reminded us to ask for what we wanted, even if non-standard. They provided recommendations but let us make the final decisions. We highly recommend the Renovate team. For our more detailed review, see Google."

Mark V on May 2025

Renovate Design/Build is a woman-owned family business servicing the Greater Seattle Area. Each person on our team is an integral part of our company's success, providing excellent service and beautifully finished remodel projects for our clients. As a small business, every job is important to our team at Renovate - you are never just a number. Please call us today for a free consultation!

"We worked with Renovate from August 2024 through April 2025. Our experience was exceptional. Ross, Eric, and Jeremiah were efficient and effective, treating our project with great care. The Renovate team stands out in several ways: - Their pricing is transparent. We paid an hourly cost and subcontractor costs, plus a fixed mark-up, which aligned incentives. Amanda provided receipts and timesheets regularly. - They have superb attention to detail. They pointed out issues we might have missed and ensured they were fixed. - They were super responsive, encouraging us to text or email any time and often responding quickly. They kept us updated on the timeline and explained any delays. - They have a strong client focus. They addressed subcontractor errors quickly and reminded us to ask for what we wanted, even if non-standard. They provided recommendations but let us make the final decisions. We highly recommend the Renovate team. For our more detailed review, see Google."

Mark V on May 2025


Avatar for Johnson Custom Builders

Johnson Custom Builders

4.95(
62
)
Approved Pro

Johnson Custom Builders

4.95(
62
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
15 years of experience

Current Super Service Award Winner for 2019 seven years running! Johnson Custom Builders is a Design Builder. Our approach is simple. It all starts with listening. We work closely with our clients to understand everything from their needs to their design preferences. Then we go to work helping them exceed their goals. www.johnsoncustombuilders.com Our process is completely transparent. Our estimates are designed to provide realistic expectations not best-case scenarios. For us, communication is key and we keep you completely informed every step of the way communicating in a way that helps you anticipate and act to effectively engineer the best possible solutions every step of the way. At Johnson Custom Builders our approach is never just about managing timelines and budgets its about delivering on promises and helping you realize dreams. One look at a Johnson Custom build and you'll immediately understand why so many discriminating customers recommend us to their friends looking for a higher level of customized home building. It's not just about the attention to detail or use of the highest-quality materials or even the custom-crafted details. It's about the personalization. Personalization that comes from a builder that not only knows how to listen but also how to anticipate, communicate and most of all deliver on a promise. A native of Kirkland, Washington, founder Ryan Johnson shares the same core values as the community he has always called home: Integrity, Honesty and Originality. He's been actively designing, building and remodeling homes in the area for over 25 years. And in that time, he has earned a stellar reputation for providing outstanding results crafted with uncompromising integrity and quality. Hes also earned a reputation for delivering on his promises. A+ rating on the Better Business Bureau (BBB) !

"Since I now need to use a wheelchair, several doorways in my home needed to be widened. Two exterior doors had to be replaced, one of which also had to be changed to open out rather than opening in. I hired Johnson Custom Builders and was absolutely delighted with their work. They were always professional. They laid or hung plastic sheeting to contain the dust they created, then at the end of the day they ran the vacuum and even mopped the floor! They were respectful of me and my home. Their work was excellent. One of the things I most appreciated was Ryan Johnson's communication with me before, during, and at the conclusion of the project. He listened to what I needed and then figured out how to make it happen. I recommend Johnson Custom Builders highly!"

Gloria L R on February 2026

Current Super Service Award Winner for 2019 seven years running! Johnson Custom Builders is a Design Builder. Our approach is simple. It all starts with listening. We work closely with our clients to understand everything from their needs to their design preferences. Then we go to work helping them exceed their goals. www.johnsoncustombuilders.com Our process is completely transparent. Our estimates are designed to provide realistic expectations not best-case scenarios. For us, communication is key and we keep you completely informed every step of the way communicating in a way that helps you anticipate and act to effectively engineer the best possible solutions every step of the way. At Johnson Custom Builders our approach is never just about managing timelines and budgets its about delivering on promises and helping you realize dreams. One look at a Johnson Custom build and you'll immediately understand why so many discriminating customers recommend us to their friends looking for a higher level of customized home building. It's not just about the attention to detail or use of the highest-quality materials or even the custom-crafted details. It's about the personalization. Personalization that comes from a builder that not only knows how to listen but also how to anticipate, communicate and most of all deliver on a promise. A native of Kirkland, Washington, founder Ryan Johnson shares the same core values as the community he has always called home: Integrity, Honesty and Originality. He's been actively designing, building and remodeling homes in the area for over 25 years. And in that time, he has earned a stellar reputation for providing outstanding results crafted with uncompromising integrity and quality. Hes also earned a reputation for delivering on his promises. A+ rating on the Better Business Bureau (BBB) !

"Since I now need to use a wheelchair, several doorways in my home needed to be widened. Two exterior doors had to be replaced, one of which also had to be changed to open out rather than opening in. I hired Johnson Custom Builders and was absolutely delighted with their work. They were always professional. They laid or hung plastic sheeting to contain the dust they created, then at the end of the day they ran the vacuum and even mopped the floor! They were respectful of me and my home. Their work was excellent. One of the things I most appreciated was Ryan Johnson's communication with me before, during, and at the conclusion of the project. He listened to what I needed and then figured out how to make it happen. I recommend Johnson Custom Builders highly!"

Gloria L R on February 2026


Avatar for Opportunity Construction LLC

Opportunity Construction LLC

4.78(
18
)
Approved Pro

Opportunity Construction LLC

4.78(
18
)
Approved Pro
Customers say: Terrific value
24 years of experience
Free onsite estimate

We are a general contractor that focuses on the customers needs since 2002. Our primary goal is find solutions that fit into the clients time frame and budget. We work on remodels, rental renovations, handy mans services for general maintenance and repairs, drainage and sewer solutions, decking. Emergency Service. Big or small projects welcome. Let us fulfill your desired needs.

"Received several bids and we liked his ideas the best. He was prompt, arrived when he stated he would and the job was completed when he said it would be. We absolutely love the addition to our deck. And was so satisfied with the work we?ve hired him for another project. "

Don C on February 2026

We are a general contractor that focuses on the customers needs since 2002. Our primary goal is find solutions that fit into the clients time frame and budget. We work on remodels, rental renovations, handy mans services for general maintenance and repairs, drainage and sewer solutions, decking. Emergency Service. Big or small projects welcome. Let us fulfill your desired needs.

"Received several bids and we liked his ideas the best. He was prompt, arrived when he stated he would and the job was completed when he said it would be. We absolutely love the addition to our deck. And was so satisfied with the work we?ve hired him for another project. "

Don C on February 2026


Avatar for Carpenters Unlimited LLC

Carpenters Unlimited LLC

3.67(
3
)
Approved Pro

Carpenters Unlimited LLC

3.67(
3
)
Approved Pro
11 years of experience
Free onsite estimate

With over 16 years of experience in the construction industry, we are the service professionals you need to take care of your home or business. We handle all types of renovation projects including additions and full house renovations. We will treat your home as we would treat our own. Give Carpenters Unlimited LLC a call today, we look forward to working with you!

"Justin Gibbons owner of Carpenters Unlimited LLC brought an illegal employee to work on our project alone (claims no employees with WA L&I). When mistakes were made, Justin GIbbons blamed the employee, attempted to fix the errors, but did not succeed in fixing the errors. Based on the work Justin Gibbons and his company Carpenters Unlimited LLC provided, we would not recommend Justin Gibbons and his company Carpenters Unlimited LLC to family or friends or anyone else. The work Justin Gibbons and his company Carpenters Unlimited LLC provided was subpar, completed late, required many follow ups from us to get fixed, and resulted in damages. We are pursing a Small Claims case against Justin Gibbons. See photos for evidence."

Kate M on January 2026

With over 16 years of experience in the construction industry, we are the service professionals you need to take care of your home or business. We handle all types of renovation projects including additions and full house renovations. We will treat your home as we would treat our own. Give Carpenters Unlimited LLC a call today, we look forward to working with you!

"Justin Gibbons owner of Carpenters Unlimited LLC brought an illegal employee to work on our project alone (claims no employees with WA L&I). When mistakes were made, Justin GIbbons blamed the employee, attempted to fix the errors, but did not succeed in fixing the errors. Based on the work Justin Gibbons and his company Carpenters Unlimited LLC provided, we would not recommend Justin Gibbons and his company Carpenters Unlimited LLC to family or friends or anyone else. The work Justin Gibbons and his company Carpenters Unlimited LLC provided was subpar, completed late, required many follow ups from us to get fixed, and resulted in damages. We are pursing a Small Claims case against Justin Gibbons. See photos for evidence."

Kate M on January 2026


Avatar for Lopez Bros Construction

Lopez Bros Construction

5.00(
9
)
Approved Pro

Lopez Bros Construction

5.00(
9
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
13 years of experience

We’re committed to remodeling and to serving you with quality and value. We'll come to you, listen to your needs and wants, and then come back to you with a logical, feasible plan that works for you. Our first-time customers continually become our long term customers time and time again, choosing us for all their remodeling needs. Call us today, and see what our commitment to quality is all about! We may not be related, but you’ll feel like we’re family. Our team is highly skilled and has years of experience. Most of all: they love planning, designing, and building and care about your project. We bring value to every interaction, and our customers love us. We promise to always provide value and outstanding service, regardless of your lifestyle need, design preference, or budget constraint.

"Highly recommend Lopez Bros Construction for any remodeling and major home repairs. We completed major home repair and remodeling, including bathroom shower repair and remodeling, Kitchen and Living Room ceiling/internal skylight enhancements, Interior and Deck Painting, and Basement Remodeling. Ray has been always going above and beyond in delivering the results. He will make sure the details and end results are perfect. His team's integrity is unquestionable, responsiveness and quality are top notch. Given the multiple projects he's dealing with, his crew still manage to get the repairs and remodeling done on time, as promised. I would hire Lopez Bros Construction again for my next project."

August W on June 2021

We’re committed to remodeling and to serving you with quality and value. We'll come to you, listen to your needs and wants, and then come back to you with a logical, feasible plan that works for you. Our first-time customers continually become our long term customers time and time again, choosing us for all their remodeling needs. Call us today, and see what our commitment to quality is all about! We may not be related, but you’ll feel like we’re family. Our team is highly skilled and has years of experience. Most of all: they love planning, designing, and building and care about your project. We bring value to every interaction, and our customers love us. We promise to always provide value and outstanding service, regardless of your lifestyle need, design preference, or budget constraint.

"Highly recommend Lopez Bros Construction for any remodeling and major home repairs. We completed major home repair and remodeling, including bathroom shower repair and remodeling, Kitchen and Living Room ceiling/internal skylight enhancements, Interior and Deck Painting, and Basement Remodeling. Ray has been always going above and beyond in delivering the results. He will make sure the details and end results are perfect. His team's integrity is unquestionable, responsiveness and quality are top notch. Given the multiple projects he's dealing with, his crew still manage to get the repairs and remodeling done on time, as promised. I would hire Lopez Bros Construction again for my next project."

August W on June 2021


"Allan was wonderful to work with. He was fantastic about communicating with us and did a stellar job of replacing my dining room floor and patching my walls after we had a pipe burst. We'd absolutely hire him again!"

Sora B on June 2022

Remodeling kitchen and bathroom , building deck and fence. Exterior painting in the summer , interior painting in winter, . Quality is my goal. 100% reponsabilyty is my nick name .

"Allan was wonderful to work with. He was fantastic about communicating with us and did a stellar job of replacing my dining room floor and patching my walls after we had a pipe burst. We'd absolutely hire him again!"

Sora B on June 2022

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FAQs for addition to existing structure building service projects in Federal Way, WA

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 Federal Way, WA 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.