Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Dupont, WA

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.

Find Addition to existing structure builders in Dupont

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


CNC Corporation

9609 Berkshire Court Southeast
4.88(
8
)
Approved Pro

CNC Corporation

9609 Berkshire Court Southeast
4.88(
8
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
35 years of experience

If you're looking for quality, reasonable prices and professionalism, look no further than CNC Corporation. We are simply the best. Serving the Thurston, Pierce and King County areas for over 30 years, we design, remodel and build custom additions that bond with your vision and style to reflect your image among your peers. Our designs will give you a boost of prestige and status, unmatched by industry standards. We are committed to satisfying our client�s needs and wants. We specialize in custom additions, remodels and deck builds, we can do it all as a general contractor. We give free quotes and are fully insured. Call us today! Office hours: 5am - 7pm

"Charlie and his team replaced siding and rotted sill and 2 x 4's due to water damage. He was very responsive in quickly supplying a bid and being available when we needed him. The work was done efficiently with he and his other worker. My only slight disappointment was that we did not have as clear of communication as we should have about unused materials and we ended up losing a piece of siding that we should have kept but truly communication is a two-way street so it was partially our fault but he should have asked as well. We will definitely call him again for work on this house very profeswe will definitely call him again for work on this house very professional"

Anne S on April 2016

If you're looking for quality, reasonable prices and professionalism, look no further than CNC Corporation. We are simply the best. Serving the Thurston, Pierce and King County areas for over 30 years, we design, remodel and build custom additions that bond with your vision and style to reflect your image among your peers. Our designs will give you a boost of prestige and status, unmatched by industry standards. We are committed to satisfying our client�s needs and wants. We specialize in custom additions, remodels and deck builds, we can do it all as a general contractor. We give free quotes and are fully insured. Call us today! Office hours: 5am - 7pm

"Charlie and his team replaced siding and rotted sill and 2 x 4's due to water damage. He was very responsive in quickly supplying a bid and being available when we needed him. The work was done efficiently with he and his other worker. My only slight disappointment was that we did not have as clear of communication as we should have about unused materials and we ended up losing a piece of siding that we should have kept but truly communication is a two-way street so it was partially our fault but he should have asked as well. We will definitely call him again for work on this house very profeswe will definitely call him again for work on this house very professional"

Anne S on April 2016


Avatar for Harmon & Harmon Consulting, Inc.

Harmon & Harmon Consulting, Inc.

4742 181st Ln SW
4.46(
47
)
Approved Pro

Harmon & Harmon Consulting, Inc.

4742 181st Ln SW
4.46(
47
)
Approved Pro
Customers say: Super punctual
38 local quotes requested
37 years of experience

With over 30 years of experience in the general contracting Industry, we are the experts you need to take care of your home or business. We handle everything from remodels to deck/porch builds. We will treat your home or business as we would treat our own. Give Harmon & Harmon Consulting a call today, we look forward to working with you!

"Had them rip out the fireplace that was installed poorly in 1990. A bit costly, but I doubt a single handyman could have done it in a timely fashion. Done in 3 days start to finish. I was expecting some water damage, but it was much worse. Getting a exact price for the work out of them beforehand was impossible. Ultimately it cost $2500 extra do to having to replace more sections of the roof and support beans. They didn't pull a fast one, the wood crumbled when touched. Labor isn't cheap. Would hire them again because the work is solid. "

Isaiah R on August 2025

With over 30 years of experience in the general contracting Industry, we are the experts you need to take care of your home or business. We handle everything from remodels to deck/porch builds. We will treat your home or business as we would treat our own. Give Harmon & Harmon Consulting a call today, we look forward to working with you!

"Had them rip out the fireplace that was installed poorly in 1990. A bit costly, but I doubt a single handyman could have done it in a timely fashion. Done in 3 days start to finish. I was expecting some water damage, but it was much worse. Getting a exact price for the work out of them beforehand was impossible. Ultimately it cost $2500 extra do to having to replace more sections of the roof and support beans. They didn't pull a fast one, the wood crumbled when touched. Labor isn't cheap. Would hire them again because the work is solid. "

Isaiah R on August 2025


Avatar for Lakeview Contractors, Inc

Lakeview Contractors, Inc

2532 Summit Lake Shore Rd NW
5.00(
11
)
Approved Pro

Lakeview Contractors, Inc

2532 Summit Lake Shore Rd NW
5.00(
11
)
Approved Pro
27 years of experience
Free onsite estimate

Established in 1998, owner Ted Hultman continues his vision with his sons; Ryder and Tanner Hultman. Together this second generation of contractors has worked hard to establish long-lasting, professional relationships with local vendors and sub contractors to ensure swift and thorough contracting services in Olympia, Lacey, Tumwater and surrounding cities of Thurston County, WA. 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. Call us today.

"Did a fantastic job building us a new fence!"

Inah _ on May 2025

Established in 1998, owner Ted Hultman continues his vision with his sons; Ryder and Tanner Hultman. Together this second generation of contractors has worked hard to establish long-lasting, professional relationships with local vendors and sub contractors to ensure swift and thorough contracting services in Olympia, Lacey, Tumwater and surrounding cities of Thurston County, WA. 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. Call us today.

"Did a fantastic job building us a new fence!"

Inah _ on May 2025


Avatar for Plantrak Decks, LLC

Plantrak Decks, LLC

26255 124th Avenue Southeast
4.82(
36
)
Approved Pro

Plantrak Decks, LLC

26255 124th Avenue Southeast
4.82(
36
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
35 years of experience

Smartdecks LLC has been in business for more than 30 years. Our area of expertise is in installing decks, Timber Frame and post & beam, structural and rot repair. We are a family owned and operated business. We strive to provide reliable and quality service with fair prices. Call us directly at 253-312-2224 to get the fastest response!

"We had Plantrex do a deck resurfaced. After it was in, there was a tenant caused deck fire. Plantrex did an outstanding job on both the original resurface and on the deck repair and restoration after the fire. Cleanup, everything was great."

Robert B on December 2021

Smartdecks LLC has been in business for more than 30 years. Our area of expertise is in installing decks, Timber Frame and post & beam, structural and rot repair. We are a family owned and operated business. We strive to provide reliable and quality service with fair prices. Call us directly at 253-312-2224 to get the fastest response!

"We had Plantrex do a deck resurfaced. After it was in, there was a tenant caused deck fire. Plantrex did an outstanding job on both the original resurface and on the deck repair and restoration after the fire. Cleanup, everything was great."

Robert B on December 2021


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 Get Renovation LLLP

Get Renovation LLLP

2578 152nd Ave NE Apt A209
5.00(
3
)
Approved Pro

Get Renovation LLLP

2578 152nd Ave NE Apt A209
5.00(
3
)
Approved Pro
1 years of experience
Free onsite estimate

Here with Get Renovation Inc, we pride ourselves on being the best remodeling company in the area. We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

"We added an ADU to our house and we?re really happy with the result. It looks like it?s always been part of the home, and the inside turned out super cozy. The crew was easy to work with and finished on time. Would definitely recommend."

Michael S on October 2025

Here with Get Renovation Inc, we pride ourselves on being the best remodeling company in the area. We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

"We added an ADU to our house and we?re really happy with the result. It looks like it?s always been part of the home, and the inside turned out super cozy. The crew was easy to work with and finished on time. Would definitely recommend."

Michael S on October 2025


Avatar for Promise Land Construction, LLC

Promise Land Construction, LLC

40 Cedar Creek Road
5.00(
7
)
Approved Pro

Promise Land Construction, LLC

40 Cedar Creek Road
5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

We take great pride 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. order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Their customer service is amazing, their pricing is very fair, and the quality is fantastic. I would recommend them to anyone and I will use them again"

Dale G on October 2023

We take great pride 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. order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Their customer service is amazing, their pricing is very fair, and the quality is fantastic. I would recommend them to anyone and I will use them again"

Dale G on October 2023


Avatar for KOI BUILD CO

KOI BUILD CO

7605 Mullen Rd Se
4.63(
12
)
Approved Pro

KOI BUILD CO

7605 Mullen Rd Se
4.63(
12
)
Approved Pro
Customers say: Quick response
8 years of experience
Free onsite estimate

Koi Construction, LLC, originally established as HK Design & Remodeling and M&I Property Services, has always started from modest beginnings. Our core belief is that true success comes from engaging passionately in our work, rather than being driven by financial motives. We are committed to excelling in our projects, making a distinct mark through exceptional performance. Our unwavering focus remains on outstanding client service and superior craftsmanship. Despite our growth, we steadfastly adhere to our fundamental mission: "To achieve ongoing success by ensuring client satisfaction, delivering high-quality services, and upholding genuine integrity, all of which culminate in the finest craftsmanship."

"The whole experience was excellent. Chris when to give us a bid. He was very knowledgeable. He told use about the triangle of stove, fridge and sink and flow. He suggested a long narrow window to replace the tile backsplash on an outside wall. It was a great idea. When sit at the new bar between the kitchen and the living room we look out into our backyard. Itâ s beautiful. The guys that did the work are extremely work oriented. They are constantly working. They were thorough, knowledgeable and open to our suggestions and requests. We wanted an additional can light no problem. They were great. They cleaned up every day before they left. They would tell use when they were going to arrive and what they planned to accomplish that day. I have old siding on the outside of my house. They matched it perfectly when eliminated a window. The price of the cabinets was a lot more reasonable the other bids and theyâ re beautiful. What I mentally pictured in my mind on how it would look and the ease of preparing meals in the new kitchen were so wrong. Itâ s at least 10 times better. It still has the same physical dimensions but how itâ s played out. It seems so much bigger. I highly recommend them for any project you need done"

Woody W on September 2024

Koi Construction, LLC, originally established as HK Design & Remodeling and M&I Property Services, has always started from modest beginnings. Our core belief is that true success comes from engaging passionately in our work, rather than being driven by financial motives. We are committed to excelling in our projects, making a distinct mark through exceptional performance. Our unwavering focus remains on outstanding client service and superior craftsmanship. Despite our growth, we steadfastly adhere to our fundamental mission: "To achieve ongoing success by ensuring client satisfaction, delivering high-quality services, and upholding genuine integrity, all of which culminate in the finest craftsmanship."

"The whole experience was excellent. Chris when to give us a bid. He was very knowledgeable. He told use about the triangle of stove, fridge and sink and flow. He suggested a long narrow window to replace the tile backsplash on an outside wall. It was a great idea. When sit at the new bar between the kitchen and the living room we look out into our backyard. Itâ s beautiful. The guys that did the work are extremely work oriented. They are constantly working. They were thorough, knowledgeable and open to our suggestions and requests. We wanted an additional can light no problem. They were great. They cleaned up every day before they left. They would tell use when they were going to arrive and what they planned to accomplish that day. I have old siding on the outside of my house. They matched it perfectly when eliminated a window. The price of the cabinets was a lot more reasonable the other bids and theyâ re beautiful. What I mentally pictured in my mind on how it would look and the ease of preparing meals in the new kitchen were so wrong. Itâ s at least 10 times better. It still has the same physical dimensions but how itâ s played out. It seems so much bigger. I highly recommend them for any project you need done"

Woody W on September 2024


Paul Haugen Construction LLC

8002 58th. Ave. NW
4.47(
142
)
Approved Pro

Paul Haugen Construction LLC

8002 58th. Ave. NW
4.47(
142
)
Approved Pro
Customers say: Quality work
309 local quotes requested
40 years of experience

We are a small company with4-9 employees. Our focus is on new custom construction, kitchen and bath remodel, additons, concrete stamping and coloring and tiling. License and bonded subcontractors are used in new construction and major re-models. We offer free estimates, and prefer to work with our customers in all design work. We have an excellent line of reasonably priced cabinets and granite counter tops. We are customer oriented and aim to please.

"Jared Lord, owner of Paul Haugen Construction, and his crew are outstanding. They are dependable, honest and do excellent work. Jared's labor and countertop cost for our project was $21, 473,65 (appx. $9K under budget). Our new cabinets, sink, stove top, range hood, tile and garbage disposal were separate costs that we paid for. Regardless, the total cost was below $50K for our beautiful and functional new kitchen."

joanne c on July 2023

We are a small company with4-9 employees. Our focus is on new custom construction, kitchen and bath remodel, additons, concrete stamping and coloring and tiling. License and bonded subcontractors are used in new construction and major re-models. We offer free estimates, and prefer to work with our customers in all design work. We have an excellent line of reasonably priced cabinets and granite counter tops. We are customer oriented and aim to please.

"Jared Lord, owner of Paul Haugen Construction, and his crew are outstanding. They are dependable, honest and do excellent work. Jared's labor and countertop cost for our project was $21, 473,65 (appx. $9K under budget). Our new cabinets, sink, stove top, range hood, tile and garbage disposal were separate costs that we paid for. Regardless, the total cost was below $50K for our beautiful and functional new kitchen."

joanne c on July 2023

...
Showing 1-10 of 990
FAQs for addition to existing structure building service projects in Dupont, 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 Dupont, 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.