How much do addition contractors typically cost?
- Lake forest, California Average$91,356
- Typical Range$49,500 - $91,356
- Low End - High End$8,540 - $200,000

Additions and Remodels
"Stop your search now, you've found the contractor you should go with, you will not be disappointed! This is the second project I've had Ben and his team do at my house and they knocked it out of the park again. This time around they remodeled two bathrooms and put in a new hall closet. They were rock stars throughout the entire project. There wasn't a single time that any reasonable request I made was denied. This was a huge load off my shoulders when dealing with such permanent decisions that comes with bathroom remodels. They were very patient and understanding as I ran into several supply issues that were out of my control during the project as well. It's very obvious that he's had years of experience with construction. His attention to detail and his forethought allowed my wife and I to rest easy knowing that they would always be able to bring up potential issues as well as offer us solutions to issues that we were going to run into many steps down the line."
EEE4B0443FA84C537CF857968CA538BF3458D39AA9F6C657A60F7A81FB9732AB 3. in October 2026

ADUs, Additions & Garage Conversions, Bathroom Remodeling, Full-Service Design, Permits & Construction , and 2 more
"thank you Eli and hq remodeling for remodeling our ugly backyard and turf it into a beautiful fun space! It was a good experience working with this company and I will recommend them to my friends and neighbors."
6A139D285C4BD09BD8F08BB9335BA237BBF4C2E696E57D371717321E65003029 C. in August 2026
Siding and decking
"Diego is a fine individual who takes his job seriously. He is punctual, follow the instructions and focus to the task and delivers an outstanding results. I trust him and definitely recommend him for your next Constraction job."
Hassan M. in December 2021

Bathroom Remodels, Kitchen Remodels, Outdoor Remodels
"Prohome remodels did a room addition for me and I could not be happier. The kindness, service, collaboration, and results are truly unmatched. Highly recommend!"
77368E82A7C4F4EB475BF231A7368CDFA268EC76B74C9C69EBE3B77E7B77AC5C F. in February 2026

ADU's, Additions, Remodels , and 1 more
"Jose and his team are the ultimate professionals. I highly recommend Prestige Home Design. Our extensive remodel is now our dream home. Our remodel included increased square footage, new plumbing, electrical, HVAc, roof and windows. Jose brought lots of great ideas to us and kept all the subs on task."
CE9F7E3E65EA7BA417D14C5099D1CA003D440E2C2C2D570A87478587488A35ED A. in September 2026
Remodeling
"Good work and always on time"
C63CBC596732C3DBCAF1DF2F868B8CD7EC98742D06CC53D569ED9B5E7E683B9B 4. in December 2025

"Awesome job. Professional, quick and exceptional performance. The guys were quick, courteous and I couldn't have asked for anything better."
EDD3F7CE3DE43997C15388909DD52B37F5D826B7F160DF804F36916F63B5B0A1 7. in October 2026

Residential, Commercial, ADU remodeling and build , and 4 more
"The addition completed by Orange Home Builders Company has greatly exceeded our expectations. The expanded area is spacious and filled with natural light, creating a welcoming and airy atmosphere. The modern design and high-quality materials used in the remodel have added a sophisticated touch to our home. The meticulous attention to detail and the seamless integration with the original structure have made this addition both beautiful and practical."
D9B2CC93A99C4CB2C49AED6ADBAA0DBE551E2F702700F55DBD78D6189E4E1974 9. in May 2025

Remodeling
"Shu and his crew did a great job. They protected my staircase and created barriers to separate the work and the rest of the house. They were always on time and they did a great job. Very pleased w the workmanship and the result. Can’t go wrong w Shu. A reliable contractor."
38C8D89D8C5A3D09F6BFFBA9FFD711D3B397CE817AF4BEBF3909EC14DBF440A2 5. in May 2026
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Depending on the type of project, you may find subtle differences in the hiring process. Here’s a look at task-specific advice.
You can use HomeAdvisor to help evaluate a contractor’s qualifications. We put pros through a screening process, and award badges to high-performing contractors. You can find these badges on a pro’s HomeAdvisor profile, and sometimes, his or her website.
Your research doesn’t stop here. Once you’ve found a few prospective companies, make an call to ask a few questions about work history, licensure and more:
In most cases, the responses you get to these three questions will give you a very good idea of the right pro for your project. If you have more than one front-runner, these additional questions can help you narrow it down.
Any good contractor will answer these questions, and most will appreciate dealing with a client that takes such an active interest in finding good service. On the other hand, if a contractor gives you a hard time with these questions, you probably want to find someone else.
Lake forest Addition & Remodeling Contractors are rated 4.7 out of 5 based on 153 reviews of 153 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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