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Addition to existing structure builders in Mililani

Avatar for MTL Max Builder Hawaii Contractor

MTL Max Builder Hawaii Contractor

370 Elelupe Road, Building C
4.03(
17
)
Approved Pro

MTL Max Builder Hawaii Contractor

370 Elelupe Road, Building C
4.03(
17
)
Approved Pro
Customers say: Quick response
68 local quotes requested
27 years of experience

MTL Max Builder Hawaii 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 customer's interests, and make their concerns the basis of our business.

"MTL did a great job and in a timely manner. Sia worked with us and went the extra mile in making sure we fully satisfied with the project. Communication was excellent. He had good suggestions and we have a beautiful house now."

Neil M on November 2024

MTL Max Builder Hawaii 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 customer's interests, and make their concerns the basis of our business.

"MTL did a great job and in a timely manner. Sia worked with us and went the extra mile in making sure we fully satisfied with the project. Communication was excellent. He had good suggestions and we have a beautiful house now."

Neil M on November 2024


Avatar for Xin Yuan Construction, Inc.

Xin Yuan Construction, Inc.

2851 Kalihi Street
5.00(
3
)
Approved Pro

Xin Yuan Construction, Inc.

2851 Kalihi Street
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

Xin Yuan Construction Inc Established in 2012. At Xin Yuan Construction Inc, we take pride in being a licensed and insured construction company with a solid track record of excellence since our establishment in 2012. With years of experience in the construction industry, we are your trusted partner for all your construction needs. Our Expertise Residential Construction: We specialize in a wide range of residential construction services, ensuring that your dream home becomes a reality. From remodeling and renovations to new construction projects, we bring innovation and quality to every residential endeavor. Commercial Construction: In addition to residential projects, we've extended our expertise to encompass commercial construction. Our experienced team is well-equipped to handle various commercial construction needs, ensuring that your business space meets the highest standards.

"Xin Yuan Construction, Inc. Service not only delivered a fence that is beautiful but also highly functional. They took into account my specific needs and preferences, resulting in a design that exceeded my expectations. I'm thrilled with the outcome and would definitely hire them again."

Karen R on April 2024

Xin Yuan Construction Inc Established in 2012. At Xin Yuan Construction Inc, we take pride in being a licensed and insured construction company with a solid track record of excellence since our establishment in 2012. With years of experience in the construction industry, we are your trusted partner for all your construction needs. Our Expertise Residential Construction: We specialize in a wide range of residential construction services, ensuring that your dream home becomes a reality. From remodeling and renovations to new construction projects, we bring innovation and quality to every residential endeavor. Commercial Construction: In addition to residential projects, we've extended our expertise to encompass commercial construction. Our experienced team is well-equipped to handle various commercial construction needs, ensuring that your business space meets the highest standards.

"Xin Yuan Construction, Inc. Service not only delivered a fence that is beautiful but also highly functional. They took into account my specific needs and preferences, resulting in a design that exceeded my expectations. I'm thrilled with the outcome and would definitely hire them again."

Karen R on April 2024


Avatar for C W P Construction, LLC

C W P Construction, LLC

408 Kawainui St
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

C W P Construction, LLC

408 Kawainui St
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
8 years of experience
Free onsite estimate

CWP 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.

CWP 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.


Avatar for Beyond Builders, LLC

Beyond Builders, LLC

835 Kawaiaha‘o St #3
4.71(
7
)
Approved Pro

Beyond Builders, LLC

835 Kawaiaha‘o St #3
4.71(
7
)
Approved Pro
Customers say: Quick response
293 local quotes requested
11 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 the start to the 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.

"Nice and clean job. 100% satisfaction."

Koichiro K on August 2025

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 the start to the 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.

"Nice and clean job. 100% satisfaction."

Koichiro K on August 2025



Coastline Construction

94-1100 Kunia Rd
4.33(
6
)
Approved Pro

Coastline Construction

94-1100 Kunia Rd
4.33(
6
)
Approved Pro
Customers say: Super punctual
140 local quotes requested
2 years of experience

We proudly provide the highest quality of service and craftsmanship for each aspect of your project. Our depth of knowledge and experience solidify our belief that customer service stands as the highest priority. We eagerly look forward to working with you and making your vision a reality. On the leeward side, we operate out of our plant and tree farm in Kunia. Our colorful design work accompanied with renderings. No one else provides this free service. Our hand drawn renderings show our clients in detail what to expect their property to look like.

"one of the best contractors I have ever worked with. Has a really sold team of professional subcontractors and manages them and the client's needs very well. I will recommend them to all of my clients."

jerin k on March 2025

We proudly provide the highest quality of service and craftsmanship for each aspect of your project. Our depth of knowledge and experience solidify our belief that customer service stands as the highest priority. We eagerly look forward to working with you and making your vision a reality. On the leeward side, we operate out of our plant and tree farm in Kunia. Our colorful design work accompanied with renderings. No one else provides this free service. Our hand drawn renderings show our clients in detail what to expect their property to look like.

"one of the best contractors I have ever worked with. Has a really sold team of professional subcontractors and manages them and the client's needs very well. I will recommend them to all of my clients."

jerin k on March 2025


Avatar for JG BUILDERS LLC

JG BUILDERS LLC

5.00(
2
)
Approved Pro

JG BUILDERS LLC

5.00(
2
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
18 years of experience

Bring Your Vision to Life with JG Builders! Whether you’re building a custom home, remodeling your kitchen or bathroom, or expanding with a new addition, JG Builders is here to turn your ideas into reality. With over 15 years of experience, we’re committed to delivering top-quality craftsmanship and integrity in every project. Our Services Include: • Custom Home Construction • Renovations & Additions • Bathroom & Kitchen Remodels • Commercial Build-Outs Licensed, insured, and bonded, we provide peace of mind with every build. Call us today at 808-295-5243 for a FREE estimate and let’s make your dream project happen!

"We did an extensive remodeling of our condo in Waikoloa. JG builders did an outstanding job. Jonathan made several helpful suggestions that helped us turn our nice condo into a real show place and made it more functional as well. We have seen several other projects that JG builders have done and they have all turned out beautifully. JG builders work is high quality and they are great to work with."

Greg J on November 2024

Bring Your Vision to Life with JG Builders! Whether you’re building a custom home, remodeling your kitchen or bathroom, or expanding with a new addition, JG Builders is here to turn your ideas into reality. With over 15 years of experience, we’re committed to delivering top-quality craftsmanship and integrity in every project. Our Services Include: • Custom Home Construction • Renovations & Additions • Bathroom & Kitchen Remodels • Commercial Build-Outs Licensed, insured, and bonded, we provide peace of mind with every build. Call us today at 808-295-5243 for a FREE estimate and let’s make your dream project happen!

"We did an extensive remodeling of our condo in Waikoloa. JG builders did an outstanding job. Jonathan made several helpful suggestions that helped us turn our nice condo into a real show place and made it more functional as well. We have seen several other projects that JG builders have done and they have all turned out beautifully. JG builders work is high quality and they are great to work with."

Greg J on November 2024


Avatar for TAL LLC

TAL LLC

2960 Pali Highway
4.00(
1
)
Approved Pro

TAL LLC

2960 Pali Highway
4.00(
1
)
Approved Pro
599 local quotes requested
17 years of experience

Tal Builders LLC located in Honolulu have over 20 years of experience in construction, project management and remodeling in both residential and commercial areas. We specialize in larger projects with a $20,000.00 minimum. Our team values customer relationships and provides high-quality services for our client’s full satisfaction.

"It was very good. Overall, it was okay. But we have some problem, they didn't finish all the landscaping."

Shawn C on January 2023

Tal Builders LLC located in Honolulu have over 20 years of experience in construction, project management and remodeling in both residential and commercial areas. We specialize in larger projects with a $20,000.00 minimum. Our team values customer relationships and provides high-quality services for our client’s full satisfaction.

"It was very good. Overall, it was okay. But we have some problem, they didn't finish all the landscaping."

Shawn C on January 2023


Avatar for All Phases Green Services

All Phases Green Services

Komo Mai Dr
4.70(
30
)
Approved Pro

All Phases Green Services

Komo Mai Dr
4.70(
30
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
359 local quotes requested

With a locally owned and operated company, you can expect friendly, personalized service. All Phases Green Services has been in business for over 20 years and offers great craftsmanship in woodworking, cabinetry, counter-tops and installations. We also specialize in tile installation and renovations.

"I would not recommend this contractor to anyone. I hired All Phases Green for a major kitchen renovation. They had done several projects for us before with good results and had been our go-to company for both small and large jobs. The kitchen started off well, and the company was responsive when design changes or unexpected issues came up. However, I noticed the owner’s helper was not meeting the standard I had come to expect from the owner—paint runs, debris in the finish, and sloppy mistakes that stood out even to me as a homeowner. I raised these concerns, expecting them to be addressed, especially since in the past, he was quick to fix any issue. While one of my concerns turned out to be a natural wood issue, instead of explaining that professionally, the owner replied with a condescending text. Shortly after, rather than taking accountability or offering solutions, he abruptly quit the job with another passive-aggressive text message, leaving a large portion of the renovation incomplete. No effort to resolve the situation—just gone. Abandoning a project because a client points out legitimate concerns is incredibly unprofessional. I am absolutely shocked he responded how he did after having worked with him for so long. If a contractor can’t handle feedback or stand behind their team’s work, they shouldn’t be in this business where client feedback should be welcomed. I trusted him, and it became clear what kind of person and business owner he is. I would not recommend this contractor to anyone."

Greg B on September 2025

With a locally owned and operated company, you can expect friendly, personalized service. All Phases Green Services has been in business for over 20 years and offers great craftsmanship in woodworking, cabinetry, counter-tops and installations. We also specialize in tile installation and renovations.

"I would not recommend this contractor to anyone. I hired All Phases Green for a major kitchen renovation. They had done several projects for us before with good results and had been our go-to company for both small and large jobs. The kitchen started off well, and the company was responsive when design changes or unexpected issues came up. However, I noticed the owner’s helper was not meeting the standard I had come to expect from the owner—paint runs, debris in the finish, and sloppy mistakes that stood out even to me as a homeowner. I raised these concerns, expecting them to be addressed, especially since in the past, he was quick to fix any issue. While one of my concerns turned out to be a natural wood issue, instead of explaining that professionally, the owner replied with a condescending text. Shortly after, rather than taking accountability or offering solutions, he abruptly quit the job with another passive-aggressive text message, leaving a large portion of the renovation incomplete. No effort to resolve the situation—just gone. Abandoning a project because a client points out legitimate concerns is incredibly unprofessional. I am absolutely shocked he responded how he did after having worked with him for so long. If a contractor can’t handle feedback or stand behind their team’s work, they shouldn’t be in this business where client feedback should be welcomed. I trusted him, and it became clear what kind of person and business owner he is. I would not recommend this contractor to anyone."

Greg B on September 2025


Avatar for JRP Construction

JRP Construction

Located In,
5.00(
4
)
Approved Pro

JRP Construction

Located In,
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
478 local quotes requested

Bringing your dream spaces to life through expert remodeling and construction services in the heart of Honolulu. Contact us today!

"Our renovation went smooth as possible he was great and he worked with us very well and I am happy with his work I will definitely hire him for future projects and recommend him to family and friends thank you very much Ryan and your team was amazing"

Sam h on November 2023

Bringing your dream spaces to life through expert remodeling and construction services in the heart of Honolulu. Contact us today!

"Our renovation went smooth as possible he was great and he worked with us very well and I am happy with his work I will definitely hire him for future projects and recommend him to family and friends thank you very much Ryan and your team was amazing"

Sam h on November 2023

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FAQs for addition to existing structure building service projects in Mililani, HI

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 Mililani, HI 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.