Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Ontario, 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 Ontario

Avatar for KN Remodeling & Supplies Inc
KN Remodeling & Supplies Inc
4.8(
38
)

Serving Ontario, CA and surrounding areas

Angi Approved

In business since 2012

Free estimates

Warranties offered

"It went very well, thanks to Nathen and his workers. They cleaned up the trash everyday when they finished the work. The work was done in the time frame they gave me with no hold ups at any point. I already recommended to s friend of mine."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+48

Response time8 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for So Cal Builders & Design Inc
So Cal Builders & Design Inc
4.7(
193
)

Serving Ontario, CA and surrounding areas

Angi Approved

Super Service Award Winner

In business since 1982

Free estimates

Warranties offered

"So Cal Builders & Design Inc did an amazing job as our general contractor for major home repairs. They fixed structural issues, updated our kitchen, and repaired damaged flooring with great attention to detail. The team was professional, communicative, and finished on time. The quality exceeded our expectations, and we felt supported throughout the whole process. Highly recommend them for any major home repair project!"
Completely renovating both the guest and master bathrooms. In the master bathroom, we're installing a spacious walk-in shower featuring dual black-finished shower heads, elegant floating benches, and marble wall tiles. Meanwhile, the guest bathroom will have a sleek built-in tub and stylish hexagon tiles.
This project involved adding a new master bathroom to the existing house. The shower features sleek white subway tiles complemented by striking black fixtures and shower door hardware. The bathroom floor is adorned with elegant white marble tiles, providing a seamless and luxurious finish. A white shaker vanity topped with a white marble countertop completes the space, creating a clean and sophisticated look.
Experience a whole new level of indoor-outdoor living with the Torres Residence Backyard Remodel. This project highlights the addition of a kitchen sliding door, seamlessly merging your interior and exterior spaces
We remodeled the current kitchen, incorporating the addition of a new sliding door to establish a seamless indoor-outdoor living area
New pool with Baja bench and spa. New pavers, aluminum patio cover and built-in BBQ in the backyard

+515

75 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Home Renew 360
Home Renew 360
4.9(
65
)

Serving Ontario, CA and surrounding areas

Angi Approved

In business since 2010

Free estimates

Warranties offered

"Our experience working with Home Renew 360 was amazing! Our project manager Idan Mizrahi was nothing but helpful, knowledgeable, and readily available throughout the process of replacing our roof. He sat down and explained the entire process at length and addressed any of our concerns all the way through to the end of the project. We look forward to working with them for any future home remodeling needs."
Roof in Huntington Beach
Asphalt Shingle Roof
Flat roof
Master Bathroom
Exterior Paint

+168

Response time8 hrs
Response rate99%
71 neighbors recently requested a quote
Supreme Remodeling Inc
4.8(
315
)

Serving Ontario, CA and surrounding areas

Angi Approved

In business since 2000

Free estimates

Warranties offered

"We did a 3 room kitchen and bath remodel in just under 3 months, and we are over the moon with how well everything came out! Micky and his team are simply superb — every team he brought in did top notch work, including tiles, flooring, plumbing, electrical, countertop, cabinets, glass, stucco, windows, drywall, and more. Micky coordinated everything to perfection, ensuring the project was progressing day to day, sometimes hour by hour. The only “negative” was that we had to work hard to keep up with their impressive pace (in terms of making decisions and ordering needed supplies) and it was well worth it! We are now starting an ADU conversion and we can’t wait for the results."
My jobs
My jobs
My jobs
My jobs
My jobs

+115

13 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for WeBuild Home Efficient
WeBuild Home Efficient
5.0(
15
)

Serving Ontario, CA and surrounding areas

Angi Approved

In business since 2019

Free estimates

Credit card accepted

"Bar and the WeBuild Efficient team did a great job installing pavers on my driveway and fixing my wooden steps and garage. He was very professional and responsive. I would recommend them, highly."
WeBuild Home Efficient
My jobs
My jobs
My jobs
My jobs

+46

10 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Jorcast Enterprises, Inc.
Jorcast Enterprises, Inc.
5.0(
11
)

Serving Ontario, CA and surrounding areas

Angi Approved

In business since 1988

Free estimates

Credit card accepted

"Jorge, Andy and their team at A1-Builders were knowledgeable, honest, reliable and above all always available to answer any questions we had. They helped build a 2 bed 1 bath 600sqft addition to our home during the lean months over the pandemic. We had multiple projects (pool, patio, retaining wall) going on at the same time with other contractors and the crew from A1-Builders were by far the most professional. They always made sure that they left their work site clean after each dayâ s work. Jorge will definitely be the first person I call for our next home project because I know that even if he does not have the time to do the work, he will always guide me in the right direction. Thank you again to the entire A1-Builder team!"
Kitchen Remodel
Accent wall
Response time2 days
3 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.3(
21
)

Serving Ontario, CA and surrounding areas

Angi Approved

In business since 2017

Free estimates

Customers say: True professional

"Leo was very helpful and quick to respond. We’re happy with how our 2 bathrooms turned out. Project was completed within the time promised. Our only complaint is that the workers did not clean up very well. But overall, we’re satisfied and we’ll use them again. "
.
.
.
.
.

+1

Response time6 hrs
Recommended by28%of homeowners
Showing 1-10 of 34
FAQs for addition to existing structure building service projects in Ontario, CA

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Ontario, 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.