Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Hawthorne, CA

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 Hawthorne

Avatar for FLJ, Inc.

FLJ, Inc.

5.00(
5
)
•Approved Pro

FLJ, Inc.

5.00(
5
)
•Approved Pro
Customers say: Quality work
10 local quotes requested
19 years of experience

FLJ INC 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.

"Frank and team were awesome to work with. We ended up doing a full remodel and the project turned out amazing."

Jason W on October 2025

FLJ INC 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.

"Frank and team were awesome to work with. We ended up doing a full remodel and the project turned out amazing."

Jason W on October 2025

Avatar for VULCAN BUILD INC

VULCAN BUILD INC

5.00(
23
)
•Approved Pro

VULCAN BUILD INC

5.00(
23
)
•Approved Pro
Customers say: Quick response
7 years of experience
Free onsite estimate

VULCAN BUILD INC 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.

"I recently had a fantastic experience with Vulcan company. Michael, the project manager, was top-notch. They worked on my bathroom, bedroom, kitchen, living room, and porch. The project was really budget-friendly, and their communication was excellent. They kept me in the loop the entire time with no surprises. The work quality was outstanding, with great attention to detail. Michael and his team were professional and efficient!"

Margot C on August 2025

VULCAN BUILD INC 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.

"I recently had a fantastic experience with Vulcan company. Michael, the project manager, was top-notch. They worked on my bathroom, bedroom, kitchen, living room, and porch. The project was really budget-friendly, and their communication was excellent. They kept me in the loop the entire time with no surprises. The work quality was outstanding, with great attention to detail. Michael and his team were professional and efficient!"

Margot C on August 2025

Avatar for DT Design and Build, Inc.

DT Design and Build, Inc.

4.91(
64
)
•Approved Pro

DT Design and Build, Inc.

4.91(
64
)
•Approved Pro
Super Service Award
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 years of experience

We at DT Design and Build, Inc., focus on the quality of our projects over quantity. We use our years of experience and expertise to complete your project with perfection. Customer service and honesty are the most important aspects of our business and your satisfaction is always guaranteed. Please call us today for an estimate. We look forward to working with you. Serious inquiries only please. If you have any question please call us at 818-2724213

"Very satisfied with this company. Finished the project in a timely manner. Tal is a great guy. Very caring and did everything possible for me to be happy"

Liana F on November 2024

We at DT Design and Build, Inc., focus on the quality of our projects over quantity. We use our years of experience and expertise to complete your project with perfection. Customer service and honesty are the most important aspects of our business and your satisfaction is always guaranteed. Please call us today for an estimate. We look forward to working with you. Serious inquiries only please. If you have any question please call us at 818-2724213

"Very satisfied with this company. Finished the project in a timely manner. Tal is a great guy. Very caring and did everything possible for me to be happy"

Liana F on November 2024

Avatar for Amaral's Construction Corp

Amaral's Construction Corp

5.00(
3
)
•Approved Pro

Amaral's Construction Corp

5.00(
3
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

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

"Great experience! We used Amaral Construction to paint our kitchen cabinets and install new countertops, sink, faucet, and garbage disposal. Edgar and his teams did great work, always showed up on time, and were very transparent in their work. They finished 3 days early to the quoted schedule and had less than 1% cost growth! Edgar chatted with me before making any decisions and was super responsive via email, text, and phone. I also appreciated never being pushed to add more work or increase the scope of the project. Edgar listened to our wants, gave advice, and went forward with our choices to a T. Thank you Amaral Construction!"

Melissa P on June 2023

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

"Great experience! We used Amaral Construction to paint our kitchen cabinets and install new countertops, sink, faucet, and garbage disposal. Edgar and his teams did great work, always showed up on time, and were very transparent in their work. They finished 3 days early to the quoted schedule and had less than 1% cost growth! Edgar chatted with me before making any decisions and was super responsive via email, text, and phone. I also appreciated never being pushed to add more work or increase the scope of the project. Edgar listened to our wants, gave advice, and went forward with our choices to a T. Thank you Amaral Construction!"

Melissa P on June 2023

Avatar for Finesse Remodeling & Consulting, Inc.

Finesse Remodeling & Consulting, Inc.

4.94(
32
)
•Approved Pro

Finesse Remodeling & Consulting, Inc.

4.94(
32
)
•Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
36 years of experience

Specializing in complete renovations, home additions, gourmet kitchens, and spa-like bathrooms, Avi’s results typically exceed customer expectations. Throughout Avi’s professional career, he has completed hundreds of medium to large scale home renovation projects is proud to be recognized as a master in project management. His business, Finesse Remodeling, oversees every detail of the home renovation process. From developing creative design ideas and solutions to closely managing every trade, and closely monitoring remodeling costs, a team of Finesse professionals will be available to execute flawless results.

"Avi and his team were fabulous. At the beginning of the process, he was the only contractor that we had spoken to that even mentioned the abatement process and how it might affect us. He was personable and friendly and made sure our need to live in the house during renovation was addressed. He stopped by regularly and had chats with us making sure we were happy with the process. Avi made sure that we knew that something might not be the best idea but if we truly wanted it he would do it. We did the kitchen, the master bedroom, master bathroom, guest bathroom, all windows, all doors including the front and garage doors. It was a huge undertaking but what a transformation. We were first time home remodelers and they walked us through every aspect of the process. When the unexpected happened, they were up front and let us know. The construction team under Luis were fabulous. We would swear Luis was a magician, the kinds of things he could get done on the spot were amazing. Definitely a man of many skills. The crew were respectful and friendly. They made sure everything was clean and livable at the end of each day. Also Joyce, the office coordinator, was awesome and we had a text thread going with her and Avi the whole time. All the permits were obtained in the proper manner and everything was done according to safety regulations. We are thrilled with all of our new home and highly recommend Finesse Remodeling and Consulting for all your interior remodeling needs."

Elisabeth B on December 2021

Specializing in complete renovations, home additions, gourmet kitchens, and spa-like bathrooms, Avi’s results typically exceed customer expectations. Throughout Avi’s professional career, he has completed hundreds of medium to large scale home renovation projects is proud to be recognized as a master in project management. His business, Finesse Remodeling, oversees every detail of the home renovation process. From developing creative design ideas and solutions to closely managing every trade, and closely monitoring remodeling costs, a team of Finesse professionals will be available to execute flawless results.

"Avi and his team were fabulous. At the beginning of the process, he was the only contractor that we had spoken to that even mentioned the abatement process and how it might affect us. He was personable and friendly and made sure our need to live in the house during renovation was addressed. He stopped by regularly and had chats with us making sure we were happy with the process. Avi made sure that we knew that something might not be the best idea but if we truly wanted it he would do it. We did the kitchen, the master bedroom, master bathroom, guest bathroom, all windows, all doors including the front and garage doors. It was a huge undertaking but what a transformation. We were first time home remodelers and they walked us through every aspect of the process. When the unexpected happened, they were up front and let us know. The construction team under Luis were fabulous. We would swear Luis was a magician, the kinds of things he could get done on the spot were amazing. Definitely a man of many skills. The crew were respectful and friendly. They made sure everything was clean and livable at the end of each day. Also Joyce, the office coordinator, was awesome and we had a text thread going with her and Avi the whole time. All the permits were obtained in the proper manner and everything was done according to safety regulations. We are thrilled with all of our new home and highly recommend Finesse Remodeling and Consulting for all your interior remodeling needs."

Elisabeth B on December 2021

Avatar for Vivid Homes, Inc.

Vivid Homes, Inc.

5.00(
11
)
•Approved Pro

Vivid Homes, Inc.

5.00(
11
)
•Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
9 years of experience

Welcome to Vivid Home Inc, a family-owned construction company based in Los Angeles. We specialize in creating custom homes, remodels, and additions that reflect our client's unique lifestyles and preferences. With over 15 years of experience in the industry, we have built a reputation for delivering exceptional craftsmanship, attention to detail, and personalized service. At Vivid Home Inc, we believe that every project is an opportunity to create something truly special. Our team works closely with our clients to bring their vision to life, from the initial concept to the final touches. We use only the highest quality materials and the latest construction techniques to ensure that every project is built to last. Whether you're looking to build your dream home from scratch, update your existing space, build an ADU, or add more square footage, Vivid Home Inc is here to help. Contact us today to schedule a consultation and see how we can turn your vision into reality.

"Vivid Homes was such an Amazon company to work with. They designed and built my dream kitchen. They were very straightforward, honest and easy to work with. I always got all my questions answered in a timely manner. I highly recommend working with Vivid Homes. My dream kitchen turned into a reality."

Orli L on October 2023

Welcome to Vivid Home Inc, a family-owned construction company based in Los Angeles. We specialize in creating custom homes, remodels, and additions that reflect our client's unique lifestyles and preferences. With over 15 years of experience in the industry, we have built a reputation for delivering exceptional craftsmanship, attention to detail, and personalized service. At Vivid Home Inc, we believe that every project is an opportunity to create something truly special. Our team works closely with our clients to bring their vision to life, from the initial concept to the final touches. We use only the highest quality materials and the latest construction techniques to ensure that every project is built to last. Whether you're looking to build your dream home from scratch, update your existing space, build an ADU, or add more square footage, Vivid Home Inc is here to help. Contact us today to schedule a consultation and see how we can turn your vision into reality.

"Vivid Homes was such an Amazon company to work with. They designed and built my dream kitchen. They were very straightforward, honest and easy to work with. I always got all my questions answered in a timely manner. I highly recommend working with Vivid Homes. My dream kitchen turned into a reality."

Orli L on October 2023

Avatar for United Express Construction, Inc.

United Express Construction, Inc.

5.00(
1
)
•Approved Pro

United Express Construction, Inc.

5.00(
1
)
•Approved Pro
18 years of experience
Free onsite estimate

United Express Construction Inc is an innovative, locally owned and operated Construction and solar installation company in Los Angeles. With years of experience in solar power system installations and General Contracting, for both residential and commercial markets, we guarantee to always provide you with top-notch, premium quality solar panel installation and construction services in Los Angeles and surrounding cities.

United Express Construction Inc is an innovative, locally owned and operated Construction and solar installation company in Los Angeles. With years of experience in solar power system installations and General Contracting, for both residential and commercial markets, we guarantee to always provide you with top-notch, premium quality solar panel installation and construction services in Los Angeles and surrounding cities.

Avatar for Sklar Construction, Inc.

Sklar Construction, Inc.

4.50(
9
)
•Approved Pro

Sklar Construction, Inc.

4.50(
9
)
•Approved Pro
Customers say: Terrific value
7 years of experience
Free onsite estimate

I am a licensed, bonded, and insured General Contractor with an extensive background in design and construction. I do not just talk the talk, I walk the walk, having physically labored in trades ranging from tile and plumbing, to foundation and framing. To this day, there is seldom a project I will not roll up my sleeves for, be it setting lines for a home addition, or laying out complex tile patterns to be reproduced by my team. I received my Masters in Architecture (M.Arch) from UCLA, where I graduated with distinction. My commencement thesis focused on the California Accessory Dwelling Unit (ADU) legislation, a space that I have become a leading expert in. Building home additions and creating additional housing in the form of ADUs is my lifework: there is nothing more rewarding than delivering a finished project to a client. If you are contemplating a home addition, major renovation, or building an ADU, give me a call. I look forward to hearing from you.

"I recently hired Sklar Construction for a major renovation on my home in Culver City, and I was blown away by their service. From start to finish, they were professional, detailed, and truly cared about my project. The team was fantastic at keeping me updated every step of the way. They answered all my questions and made sure I felt comfortable with the progress. They finished the project on time, and the quality of their work was incredible. My home looks amazing, and I've gotten so many compliments on the renovation. What really stood out to me was how Sklar Construction listened to my ideas and offered great suggestions to make my vision even better. They were committed to delivering top-notch results, and it shows in every detail. I highly recommend Sklar Construction. If you need a renovation done right and want to work with a team that truly cares, go with them. You won't be disappointed!"

Yonah N on June 2024

I am a licensed, bonded, and insured General Contractor with an extensive background in design and construction. I do not just talk the talk, I walk the walk, having physically labored in trades ranging from tile and plumbing, to foundation and framing. To this day, there is seldom a project I will not roll up my sleeves for, be it setting lines for a home addition, or laying out complex tile patterns to be reproduced by my team. I received my Masters in Architecture (M.Arch) from UCLA, where I graduated with distinction. My commencement thesis focused on the California Accessory Dwelling Unit (ADU) legislation, a space that I have become a leading expert in. Building home additions and creating additional housing in the form of ADUs is my lifework: there is nothing more rewarding than delivering a finished project to a client. If you are contemplating a home addition, major renovation, or building an ADU, give me a call. I look forward to hearing from you.

"I recently hired Sklar Construction for a major renovation on my home in Culver City, and I was blown away by their service. From start to finish, they were professional, detailed, and truly cared about my project. The team was fantastic at keeping me updated every step of the way. They answered all my questions and made sure I felt comfortable with the progress. They finished the project on time, and the quality of their work was incredible. My home looks amazing, and I've gotten so many compliments on the renovation. What really stood out to me was how Sklar Construction listened to my ideas and offered great suggestions to make my vision even better. They were committed to delivering top-notch results, and it shows in every detail. I highly recommend Sklar Construction. If you need a renovation done right and want to work with a team that truly cares, go with them. You won't be disappointed!"

Yonah N on June 2024

Avatar for Beverly Builders Group

Beverly Builders Group

4.96(
58
)
•Approved Pro

Beverly Builders Group

4.96(
58
)
•Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
9 years of experience

General contractor specializing in residential homes, design & build contractor. Call us today for a free estimate!

"We just had our kitchen completely renovated by Beverly Builders Group, and we couldn't be happier with the end result! Lawrence was our contractor and he fully brought our vision to life!!! My family and I went out of the country while the kitchen renovations were done and Lawrence took care of everything for us. He was super easy to get in contact with when we needed him or had any questions. He honestly went above and beyond for us and I loved how transparent he was about the job along the way. I've worked with other contractors in the past that weren't so honest and it was such a nice experience this time around. Emily was our project coordinator and designer and kept us updated daily on what was happening. We were always in communication with her and she overlooked our shopping list of all appliances so nothing was missed on our installation dates. Their team was amazing and I highly recommend them to anyone who wants the best! We were so happy with them that our master bathroom"

Rafael M on December 2024

General contractor specializing in residential homes, design & build contractor. Call us today for a free estimate!

"We just had our kitchen completely renovated by Beverly Builders Group, and we couldn't be happier with the end result! Lawrence was our contractor and he fully brought our vision to life!!! My family and I went out of the country while the kitchen renovations were done and Lawrence took care of everything for us. He was super easy to get in contact with when we needed him or had any questions. He honestly went above and beyond for us and I loved how transparent he was about the job along the way. I've worked with other contractors in the past that weren't so honest and it was such a nice experience this time around. Emily was our project coordinator and designer and kept us updated daily on what was happening. We were always in communication with her and she overlooked our shopping list of all appliances so nothing was missed on our installation dates. Their team was amazing and I highly recommend them to anyone who wants the best! We were so happy with them that our master bathroom"

Rafael M on December 2024

Avatar for Socal Express Restoration and Construction Inc.

Socal Express Restoration and Construction Inc.

New on HomeAdvisorNew on HomeAdvisor
•Approved Pro

Socal Express Restoration and Construction Inc.

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

We are an ethical, honest and professional company. We are easy to communicate with. Always working with you until the job is done right and to your specifications. When working with our company you can expect integrity, prompt service and superior customer service. Always leaving the job site clean . We take pride in our services and enjoy making clients repeat clients. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. Call us today for your free estimate. You'll be pleased you did. Thank you

We are an ethical, honest and professional company. We are easy to communicate with. Always working with you until the job is done right and to your specifications. When working with our company you can expect integrity, prompt service and superior customer service. Always leaving the job site clean . We take pride in our services and enjoy making clients repeat clients. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. Call us today for your free estimate. You'll be pleased you did. Thank you

...
Showing 1-10 of 1062
FAQs for addition to existing structure building service projects in Hawthorne, CA

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 Hawthorne, CA 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.

See all articles