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Addition to existing structure builders in Northridge

Avatar for Machaon Construction
Machaon Construction
3045 La Coronoa Avenue
4.90(
5
)
Approved Pro
Machaon Construction
3045 La Coronoa Avenue
4.90(
5
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
22 years of experience

At Machaon Construction, we pride ourselves on being the best Construction company in the area. We have 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 us get started!

"Stellar job, fabulous company, excellent experience."

Donna B on August 2020

At Machaon Construction, we pride ourselves on being the best Construction company in the area. We have 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 us get started!

"Stellar job, fabulous company, excellent experience."

Donna B on August 2020


Avatar for VULCAN BUILD INC
VULCAN BUILD INC
8549 WILSHIRE BLVD # 3189
5.00(
22
)
Approved Pro
VULCAN BUILD INC
8549 WILSHIRE BLVD # 3189
5.00(
22
)
Approved Pro
Customers say: Quick response
13 local quotes requested
7 years of experience

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’m incredibly impressed with Vulcan Build. From the initial consultation to the final walkthrough, everything was handled with care and precision. Michael’s team was efficient, tidy, and proactive in keeping me updated. The results speak for themselves — high-quality work delivered right on time."

Jacob H on April 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’m incredibly impressed with Vulcan Build. From the initial consultation to the final walkthrough, everything was handled with care and precision. Michael’s team was efficient, tidy, and proactive in keeping me updated. The results speak for themselves — high-quality work delivered right on time."

Jacob H on April 2025


Avatar for DT Design and Build, Inc.
DT Design and Build, Inc.
15210 Ventura Blvd #208
4.91(
64
)
Approved Pro
DT Design and Build, Inc.
15210 Ventura Blvd #208
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 West Side Builder
West Side Builder
3161 Fairfield Ave
5.00(
7
)
Approved Pro
West Side Builder
3161 Fairfield Ave
5.00(
7
)
Approved Pro
Customers say: Quick response
4 years of experience
Free onsite estimate

We are a locally owned and operated company that values honesty, integrity, and will treat your home as if it were our own. We have many years of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced, while still paying close attention to the details of each and every project that we are involved with. We take pride in building long lasting relationships and look forward to hearing from you!

"They were on time and they did a great job"

Katie G on February 2022

We are a locally owned and operated company that values honesty, integrity, and will treat your home as if it were our own. We have many years of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced, while still paying close attention to the details of each and every project that we are involved with. We take pride in building long lasting relationships and look forward to hearing from you!

"They were on time and they did a great job"

Katie G on February 2022


Avatar for Ores Construction Inc
Ores Construction Inc
13488 Maxella Ave #401
5.00(
6
)
Approved Pro
Ores Construction Inc
13488 Maxella Ave #401
5.00(
6
)
Approved Pro
3 years of experience
Free onsite estimate

Ores Construction Inc is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you.

"Omer was very knowledgeable. Great customer service. Project was on schedule and within the estimate. I’m very satisfied with his work!"

Wen W on April 2025

Ores Construction Inc is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you.

"Omer was very knowledgeable. Great customer service. Project was on schedule and within the estimate. I’m very satisfied with his work!"

Wen W on April 2025


Avatar for Socal Express Restoration and Construction Inc.
Socal Express Restoration and Construction Inc.
6860 Canby Avenue, Suite 114
New on HomeAdvisorNew on Angi
Approved Pro
Socal Express Restoration and Construction Inc.
6860 Canby Avenue, Suite 114
New on AngiNew 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


Avatar for Harari Construction Inc.
Harari Construction Inc.
9719 Oakmore Rd
5.00(
15
)
Approved Pro
Harari Construction Inc.
9719 Oakmore Rd
5.00(
15
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
5 years of experience

At Harari Construction, we believe that our success is determined by delivering quality projects and earning our clients? trust. This is at the heart of our business and instilled in every aspect of our operations. Clients turn to us with their dreams and we strive to meet or exceed their expectations.

"I hired Harari construction for a new home build. They were on time, did great work, and easy to work with. They continue to be responsive and available any time an issue arises. I would highly recommend Harari contraction for your project."

Asher A on September 2024

At Harari Construction, we believe that our success is determined by delivering quality projects and earning our clients? trust. This is at the heart of our business and instilled in every aspect of our operations. Clients turn to us with their dreams and we strive to meet or exceed their expectations.

"I hired Harari construction for a new home build. They were on time, did great work, and easy to work with. They continue to be responsive and available any time an issue arises. I would highly recommend Harari contraction for your project."

Asher A on September 2024


Avatar for Adar Builders, Inc.
Adar Builders, Inc.
7673 Winnetka Ave
4.90(
50
)
Approved Pro
Adar Builders, Inc.
7673 Winnetka Ave
4.90(
50
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
7 years of experience

Adar Builders was founded by two brothers, Tomer and Amit, who are both on a mission to make a difference in the construction industry. With 10 years of experience in their pockets, they set out to provide homeowners with beautiful and high-quality products and craftsmanship. There years of experience prior to branching off to follow their own dreams has allowed them to build a remarkable team of vetted industry leaders and vendors to work with. Bringing you expertise in everything from new construction to renovation and everything in between. Leaving no room untouched, and all homeowners happy.

"Don't waste your time with this company their communication is horrendous and they do not comply with any of their so called warranties. I highly recommend looking elsewhere because I am shocked as tp how they have such high ratings! I have been trying to get my ac fixed that they installed provided for over a month. Both myself and my realtors have been in contact with them and after a month of emails and phone calls they all of a sudden say they aren't at fault even though at first they said it "worked". Never use them horrible company and standards!!!!"

Katheryne I on December 2024

Adar Builders was founded by two brothers, Tomer and Amit, who are both on a mission to make a difference in the construction industry. With 10 years of experience in their pockets, they set out to provide homeowners with beautiful and high-quality products and craftsmanship. There years of experience prior to branching off to follow their own dreams has allowed them to build a remarkable team of vetted industry leaders and vendors to work with. Bringing you expertise in everything from new construction to renovation and everything in between. Leaving no room untouched, and all homeowners happy.

"Don't waste your time with this company their communication is horrendous and they do not comply with any of their so called warranties. I highly recommend looking elsewhere because I am shocked as tp how they have such high ratings! I have been trying to get my ac fixed that they installed provided for over a month. Both myself and my realtors have been in contact with them and after a month of emails and phone calls they all of a sudden say they aren't at fault even though at first they said it "worked". Never use them horrible company and standards!!!!"

Katheryne I on December 2024


YOR Construction and Investments, Inc.
12135 Miranda St
5.00(
1
)
Approved Pro
YOR Construction and Investments, Inc.
12135 Miranda St
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
16 years of experience

YOR Construction and Investments, 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.

"Excellent customer service and great job done!"

J M on April 2021

YOR Construction and Investments, 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.

"Excellent customer service and great job done!"

J M on April 2021


Avatar for Golenberg & Co Construction, Inc.
Golenberg & Co Construction, Inc.
5304 Derry Ave, Suite E
5.00(
2
)
Approved Pro
Golenberg & Co Construction, Inc.
5304 Derry Ave, Suite E
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
33 years of experience

We pride our company on 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. We look forward to earning your business! Book with us online or feel free to give us a call today!

"This company is honest and professional. they are always on time and on budget, and do a great job. I have already referred them numerous times."

Marla S on September 2020

We pride our company on 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. We look forward to earning your business! Book with us online or feel free to give us a call today!

"This company is honest and professional. they are always on time and on budget, and do a great job. I have already referred them numerous times."

Marla S on September 2020

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Addition to existing structure building services FAQs

How far you can push a room depends on the structure you choose. A cantilevered bump-out can extend 24 inches before building codes require its own footing or foundation. Anything longer needs engineered support and a permit. Check local codes or consult with a structural professional before finalizing plans to ensure your design remains safe and compliant.

Most bump-outs are completed within one to four weeks, even with minimal electrical, plumbing, or HVAC work. Their compact size means less demolition, simpler inspections, and fewer weather-related delays compared to a full-scale addition. Your contractor can provide a more precise timeline once they have determined the scope, materials, and permit schedule, but plan on having the extra square footage ready in approximately a month.

The 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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