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Find Addition to existing structure builders in Wallingford

Platinum General Construction LLC

6208 202nd St SW Unit 66
5.00(
6
)
Approved Pro

Platinum General Construction LLC

6208 202nd St SW Unit 66
5.00(
6
)
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!

"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


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


Avatar for Mount Baker Remodeling

Mount Baker Remodeling

2534 34th Avenue South
4.29(
7
)
Approved Pro

Mount Baker Remodeling

2534 34th Avenue South
4.29(
7
)
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.

" We engaged My Baker after our basement flooded a few years ago. They did very good work on a project despite it being during the pandemic. Their workers were respectful and the project was finished on budget at quality standards we were thrilled with. "

Jason S on July 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.

" We engaged My Baker after our basement flooded a few years ago. They did very good work on a project despite it being during the pandemic. Their workers were respectful and the project was finished on budget at quality standards we were thrilled with. "

Jason S on July 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 Topaz Remodeling, Inc.

Topaz Remodeling, Inc.

800 5th Ave, Suite 101-800
5.00(
74
)
Approved Pro

Topaz Remodeling, Inc.

800 5th Ave, Suite 101-800
5.00(
74
)
Approved Pro
Customers say: Quality work
220 local quotes requested
11 years of experience

Welcome to Topaz Remodeling Inc, where we believe that building your vision is our mission! We are a premier construction company with a passion for creating quality spaces that enhance your daily life. Whether you're dreaming of a new custom home or a stunning renovation our team of experienced professionals is here to guide you through every step of the process. Topaz Remodeling Inc. has been serving the community for 25 years and We believe that our family-owned status gives us a unique advantage in the construction industry, as we are able to provide a level of personal attention and care that larger, corporate companies simply cannot match We understand that each construction project is more than just a job; it's an investment in your home or business. That's why we take great pride in our work and are committed to delivering the highest level of quality and craftsmanship on every project we undertake.

"We had our bathroom remodeled by John, Yoni, and Shalev, and I couldn’t be happier. With my back problems, I needed a shower that was more accessible and comfortable. They listened carefully to my needs and created a space that is both functional and beautiful."

Donovan on September 2025

Welcome to Topaz Remodeling Inc, where we believe that building your vision is our mission! We are a premier construction company with a passion for creating quality spaces that enhance your daily life. Whether you're dreaming of a new custom home or a stunning renovation our team of experienced professionals is here to guide you through every step of the process. Topaz Remodeling Inc. has been serving the community for 25 years and We believe that our family-owned status gives us a unique advantage in the construction industry, as we are able to provide a level of personal attention and care that larger, corporate companies simply cannot match We understand that each construction project is more than just a job; it's an investment in your home or business. That's why we take great pride in our work and are committed to delivering the highest level of quality and craftsmanship on every project we undertake.

"We had our bathroom remodeled by John, Yoni, and Shalev, and I couldn’t be happier. With my back problems, I needed a shower that was more accessible and comfortable. They listened carefully to my needs and created a space that is both functional and beautiful."

Donovan on September 2025


Avatar for Rosell Home, LLC

Rosell Home, LLC

P.O. Box 2923
4.90(
26
)
Approved Pro

Rosell Home, LLC

P.O. Box 2923
4.90(
26
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
23 local quotes requested

Welcome to Rosell Home, LLC, where we bring over 20 years of experience to deliver the highest standard of craftsmanship and customer service in new home builds, residential remodels, and home additions. Our expertise extends to architectural and engineering services, ensuring your project meets both aesthetic and structural requirements. As part of our comprehensive offerings, we handle all permitting needs with the city, streamlining the process for you. In collaboration with our sister company, Washington Cabinet Co., we proudly manufacture modern and traditional cabinets tailored to your kitchen, bathroom, or closet needs. Our cabinet design center is conveniently located in downtown Redmond, WA. Come in, meet with our designer, and design your dream cabinetry with Washington Cabinet Co.As a locally owned business, we are deeply committed to our community and dedicated to making the remodeling process as effortless and rewarding as possible for our clients. Give us a call today!

"In addition to my other 5 star ratings I would like to add a five star appreciation for the entire teams respect for the home owners comfort and wishes as well as pride in their work."

Bev G on November 2023

Welcome to Rosell Home, LLC, where we bring over 20 years of experience to deliver the highest standard of craftsmanship and customer service in new home builds, residential remodels, and home additions. Our expertise extends to architectural and engineering services, ensuring your project meets both aesthetic and structural requirements. As part of our comprehensive offerings, we handle all permitting needs with the city, streamlining the process for you. In collaboration with our sister company, Washington Cabinet Co., we proudly manufacture modern and traditional cabinets tailored to your kitchen, bathroom, or closet needs. Our cabinet design center is conveniently located in downtown Redmond, WA. Come in, meet with our designer, and design your dream cabinetry with Washington Cabinet Co.As a locally owned business, we are deeply committed to our community and dedicated to making the remodeling process as effortless and rewarding as possible for our clients. Give us a call today!

"In addition to my other 5 star ratings I would like to add a five star appreciation for the entire teams respect for the home owners comfort and wishes as well as pride in their work."

Bev G on November 2023


High Level Builders

17651 1st Ave S Suite 106
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

High Level Builders

17651 1st Ave S Suite 106
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
6 years of experience
Free onsite estimate

With over 10 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. We will treat your home as we would treat our own. Give High Level Builders a call today, we look forward to working with you!

With over 10 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. We will treat your home as we would treat our own. Give High Level Builders a call today, we look forward to working with you!


Avatar for A TO Z HOME REMODELING LLC

A TO Z HOME REMODELING LLC

1024 N 10TH PL SUITE 2446
5.00(
9
)
Approved Pro

A TO Z HOME REMODELING LLC

1024 N 10TH PL SUITE 2446
5.00(
9
)
Approved Pro
1 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 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.

"Very professional! Easy to work with. Always available, kitchen remodel done in a timely manner Excellent workmanship great crew. Will definitely hire them again for future projects. Nancy O."

Nancy O on May 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 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.

"Very professional! Easy to work with. Always available, kitchen remodel done in a timely manner Excellent workmanship great crew. Will definitely hire them again for future projects. Nancy O."

Nancy O on May 2025

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

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 Wallingford, 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.

  • 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.