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Addition to existing structure builders in Seattle

Platinum General Construction LLC
6208 202nd St SW Unit 66
5.00(
5
)
Approved Pro
Platinum General Construction LLC
6208 202nd St SW Unit 66
5.00(
5
)
Approved Pro
Customers say: Quick response
9 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!

"Platinum General Construction LLC was contacted after two initially hired contractors were incompetent in providing the remodeling services needed for our bathroom remodel in Dec/Jan 2025. Platinum stepped in and completed the work on time and as quoted. David was our primary contact. He was great as respects communication, working through issues, and coordinating with subcontractors. The remodel included heated tile floors, a curbless shower, toilet install, and beautiful tile work. We were pleased that Platinum got our project back on track and finished after dealing with the mis-steps of our original contractors."

Ron B on April 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!

"Platinum General Construction LLC was contacted after two initially hired contractors were incompetent in providing the remodeling services needed for our bathroom remodel in Dec/Jan 2025. Platinum stepped in and completed the work on time and as quoted. David was our primary contact. He was great as respects communication, working through issues, and coordinating with subcontractors. The remodel included heated tile floors, a curbless shower, toilet install, and beautiful tile work. We were pleased that Platinum got our project back on track and finished after dealing with the mis-steps of our original contractors."

Ron B on April 2025


Avatar for Home Care Contractors, LLC
Home Care Contractors, LLC
10634 Riverside Dr E Ste 205
4.84(
19
)
Approved Pro
Home Care Contractors, LLC
10634 Riverside Dr E Ste 205
4.84(
19
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
8 years of experience

Home Care Contractors, 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.

"Overall good experience with HCC."

Jessica B on November 2021

Home Care Contractors, 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.

"Overall good experience with HCC."

Jessica B on November 2021


Avatar for Modern Outdoor Builders LLC
Modern Outdoor Builders LLC
10717 Renton Ave S
5.00(
15
)
Approved Pro
Modern Outdoor Builders LLC
10717 Renton Ave S
5.00(
15
)
Approved Pro
Super Service Award
Customers say: Quick response
3 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 custom 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.

"Professional and on time service. Would recommend to anyone looking for help with their dreams. "

Jesse L on March 2025

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's custom 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.

"Professional and on time service. Would recommend to anyone looking for help with their dreams. "

Jesse L on March 2025


Greg Appert Construction
15803 Gold Bar Drive
5.00(
1
)
Approved Pro
Greg Appert Construction
15803 Gold Bar Drive
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
29 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


WALT KANE CONSTRUCTION, LLC
5230 336TH AVE SE
5.00(
5
)
Approved Pro
WALT KANE CONSTRUCTION, LLC
5230 336TH AVE SE
5.00(
5
)
Approved Pro
Customers say: Quick response
4 years of experience
Free onsite estimate

With over 30 years of experience, 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. // Payment: Cash, Zelle & Check // M-F: 7am - 5pm

"During the summer of 2024, we were looking to get our basement completely renovated and we are so lucky that we connected with Zach. Zach and his talented crew worked endlessly to achieve our vision for the space and get it done within an extremely fast timeline. The detail to attention, easy and seamless communication and the trust we had for his crew are among the many reasons we will always use Zach for our home projects. "

Morgan R on January 2025

With over 30 years of experience, 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. // Payment: Cash, Zelle & Check // M-F: 7am - 5pm

"During the summer of 2024, we were looking to get our basement completely renovated and we are so lucky that we connected with Zach. Zach and his talented crew worked endlessly to achieve our vision for the space and get it done within an extremely fast timeline. The detail to attention, easy and seamless communication and the trust we had for his crew are among the many reasons we will always use Zach for our home projects. "

Morgan R on January 2025


Avatar for Mount Baker Remodeling
Mount Baker Remodeling
2534 34th Avenue South
4.17(
6
)
Approved Pro
Mount Baker Remodeling
2534 34th Avenue South
4.17(
6
)
Approved Pro
24 years of experience
Free onsite estimate

Since 2000 Mount Baker Remodeling has been expanding its circle of clients through a variety of high quality remodeling projects - kitchens, baths, basements, additional dwelling units, and more. We look forward to helping you create a beautiful, enjoyable and practical backdrop to your home life - a home remodeled for better living. MBR gives special attention to customized interior/exterior architectural and decorative details that create one-of-a kind living spaces. Mount Baker Remodeling uses the highest quality products to ensure that your remodel stands the test of time. We strive to complete every project, large or small, on time and on budget. With team collaboration, we turn your vision into reality.

"Has a number of improvements done to our unit including installation of a kitchen exhaust fan and related ducting, cabinet hanging, etc. Very pleased with the quality of work, thoughtful problem solving and most of all communication. Definitely recommend Mt. Baker Remodeling and their staff."

Robert P on June 2025

Since 2000 Mount Baker Remodeling has been expanding its circle of clients through a variety of high quality remodeling projects - kitchens, baths, basements, additional dwelling units, and more. We look forward to helping you create a beautiful, enjoyable and practical backdrop to your home life - a home remodeled for better living. MBR gives special attention to customized interior/exterior architectural and decorative details that create one-of-a kind living spaces. Mount Baker Remodeling uses the highest quality products to ensure that your remodel stands the test of time. We strive to complete every project, large or small, on time and on budget. With team collaboration, we turn your vision into reality.

"Has a number of improvements done to our unit including installation of a kitchen exhaust fan and related ducting, cabinet hanging, etc. Very pleased with the quality of work, thoughtful problem solving and most of all communication. Definitely recommend Mt. Baker Remodeling and their staff."

Robert P on June 2025


Avatar for Barcelo Development, LLC
Barcelo Development, LLC
1414 E Yessler Way
5.00(
8
)
Approved Pro
Barcelo Development, LLC
1414 E Yessler Way
5.00(
8
)
Approved Pro
15 local quotes requested
25 years of experience

Barcelo Development (formerly Barcelo Homes) includes residential and commercial remodels and new construction for single family homes showcasing our versatility in transforming spaces. With over 25 years of experience, we have proudly built and remodeled up to 1,000 homes, delivering exceptional quality and craftsmanship. Our homes feature functional open floor plans that blend style and comfort, complemented by high-end finishing details.

"I had them remodel my kitchen and the results were amazing. The team was professional, organized, and finished within the timeline. They paid attention to details and made the whole process easy. Highly recommend."

Tim L on May 2025

Barcelo Development (formerly Barcelo Homes) includes residential and commercial remodels and new construction for single family homes showcasing our versatility in transforming spaces. With over 25 years of experience, we have proudly built and remodeled up to 1,000 homes, delivering exceptional quality and craftsmanship. Our homes feature functional open floor plans that blend style and comfort, complemented by high-end finishing details.

"I had them remodel my kitchen and the results were amazing. The team was professional, organized, and finished within the timeline. They paid attention to details and made the whole process easy. Highly recommend."

Tim L on May 2025


Avatar for Seattle Style Remodel & Landscaping, Inc.
Seattle Style Remodel & Landscaping, Inc.
1420 NW Gilman Blvd #2166
4.83(
29
)
Approved Pro
Seattle Style Remodel & Landscaping, Inc.
1420 NW Gilman Blvd #2166
4.83(
29
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
40 local quotes requested

SSR is an industry leader with over 75 years of combined experience in our field. Our goal is to exceed your expectations of customer service, product quality, workmanship, and communication. SSR offers an array of services varying in size and scope. Our talented, dedicated team of experts is able to assist you from concept to completion. We have the experience and resources to handle the unique working conditions of the region and ensure timely completion of your project. Most importantly, we respect the fact that we are working in your home. For your safety and peace of mind, all of our experts are fully licensed and bonded. - SSR

"They did an extensive kitchen and master bath remodel and did excellent work."

Andrew S on April 2025

SSR is an industry leader with over 75 years of combined experience in our field. Our goal is to exceed your expectations of customer service, product quality, workmanship, and communication. SSR offers an array of services varying in size and scope. Our talented, dedicated team of experts is able to assist you from concept to completion. We have the experience and resources to handle the unique working conditions of the region and ensure timely completion of your project. Most importantly, we respect the fact that we are working in your home. For your safety and peace of mind, all of our experts are fully licensed and bonded. - SSR

"They did an extensive kitchen and master bath remodel and did excellent work."

Andrew S on April 2025


Avatar for Wylie Painting & Construction, Inc.
Wylie Painting & Construction, Inc.
PO Box 1
4.58(
6
)
Approved Pro
Wylie Painting & Construction, Inc.
PO Box 1
4.58(
6
)
Approved Pro
Customers say: Quality work
16 years of experience
Free onsite estimate

Since 1996, Wylie Construction has been at the forefront of blending traditional craftsmanship with modern technology. As a family-owned business, we pride ourselves on bringing a personal touch to every project, ensuring that each home we work on resonates with the dreams and aspirations of its owner. Our specialties encompass state-of-the-art kitchen redesigns, midsize to major home overhauls, and cutting-edge Detached Accessory Dwelling Units (DADUs). Our tech-savvy approach ensures that our projects not only meet but exceed the expectations of today's tech-oriented homeowners. With full licensing and bonding, we guarantee that no project is too ambitious for our seasoned team. Trust in Wylie Construction to bring your tech-integrated dream home to life.

"We hired WPC to construct an addition our home. The project started well and we were generally happy with their work. There were several points where their oversight of subcontractor work was lacking, including a major framing mistake and roofing material that did match the rest of our house. Their invoices lacked details and upon requesting receipts and hours breakdown it was clear there were some discrepancies. For example, we were charged 8 hours for two 20 minute inspection appointments. Getting towards the end of the project it was clear that they were going to far exceed the budget our contract specified and work was very sporadic, dragging the project schedule out unnecessarily. We had a disagreement about how they were applying their margin to a new heating system in our existing home (i.e. not part of the addition), which eventually led them pulling out of the project. Had they not done that, we would have fired them due to their poor performance. We had a neighbor who hired them for a DADU project and he had a similar complaint about them not being able to deliver at the end of the project. We were lucky to find another contractor that actually showed up to do the work and did exactly what they said they would do."

Michael H on May 2021

Since 1996, Wylie Construction has been at the forefront of blending traditional craftsmanship with modern technology. As a family-owned business, we pride ourselves on bringing a personal touch to every project, ensuring that each home we work on resonates with the dreams and aspirations of its owner. Our specialties encompass state-of-the-art kitchen redesigns, midsize to major home overhauls, and cutting-edge Detached Accessory Dwelling Units (DADUs). Our tech-savvy approach ensures that our projects not only meet but exceed the expectations of today's tech-oriented homeowners. With full licensing and bonding, we guarantee that no project is too ambitious for our seasoned team. Trust in Wylie Construction to bring your tech-integrated dream home to life.

"We hired WPC to construct an addition our home. The project started well and we were generally happy with their work. There were several points where their oversight of subcontractor work was lacking, including a major framing mistake and roofing material that did match the rest of our house. Their invoices lacked details and upon requesting receipts and hours breakdown it was clear there were some discrepancies. For example, we were charged 8 hours for two 20 minute inspection appointments. Getting towards the end of the project it was clear that they were going to far exceed the budget our contract specified and work was very sporadic, dragging the project schedule out unnecessarily. We had a disagreement about how they were applying their margin to a new heating system in our existing home (i.e. not part of the addition), which eventually led them pulling out of the project. Had they not done that, we would have fired them due to their poor performance. We had a neighbor who hired them for a DADU project and he had a similar complaint about them not being able to deliver at the end of the project. We were lucky to find another contractor that actually showed up to do the work and did exactly what they said they would do."

Michael H on May 2021


Avatar for T AM I LLC
T AM I LLC
4725 212th St SW
4.50(
1
)
Approved Pro
T AM I LLC
4725 212th St SW
4.50(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
25 years of experience

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. Our services are customized to the individual project, paying close attention to the details of each project that we're involved with. 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 guaranteeing your satisfaction!

"also remodeled my bathroom and back yard very happy"

Lois P on December 2024

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. Our services are customized to the individual project, paying close attention to the details of each project that we're involved with. 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 guaranteeing your satisfaction!

"also remodeled my bathroom and back yard very happy"

Lois P on December 2024

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

Converting an existing space into a laundry room is more affordable than building a new addition. While new additions start at $5,000, renovating an existing space for laundry use can begin at $1,300. 

Your specific costs will depend on whether plumbing and electrical connections exist nearby, the quality of finishes you select, and whether any structural modifications are needed. Always budget extra for unexpected issues, particularly in older homes where hidden problems might surface during renovation.

The smallest practical size for a new laundry room addition is 35 square feet, which provides enough space for basic appliances and minimal storage. For renovations utilizing existing space, smaller footprints might work with space-saving solutions like stacked appliances. 

A standard-sized laundry room of 60 square feet offers more comfort and functionality, allowing for counter space and storage cabinets. The optimal size depends on your household needs and available space.

Yes, adding a laundry room requires several permits, particularly for new additions. You'll need building permits, plus specific permits for electrical work, plumbing installations, and possibly HVAC modifications. 

Requirements vary significantly by municipality, so consulting with your local building department before starting work is essential. Proceeding without proper permits can result in fines, mandatory removal of completed work, and complications when selling your property.

The timeline for completing a laundry room addition varies based on project complexity, contractor availability, and permit processing times. Factors that can extend the schedule include material delivery delays, weather conditions, and unforeseen structural issues discovered during construction. 

Renovating an existing space often requires less time than building a completely new addition. Working with an experienced contractor who can coordinate various tradespeople efficiently helps keep your project on schedule.

The Seattle, 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.
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