How much do addition contractors typically cost?
- Mission viejo, California Average$91,356
- Typical Range$43,870 - $91,356
- Low End - High End$8,540 - $200,000

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

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

Additions, Major Renovations, Remodeling , and 5 more
"I'm so happy I found Shape Remodeling and Design! My bathroom was beautifully transformed and I couldn't be happier with the results. If you're looking for a reliable remodeling company I would not hesitate to recommend them!"
44386C21128DE12DCDD76D17AA9B8C467B517F6FA928B012C499C06F95B46F95 6. in June 2026

Landscape Design, Pools, Bathroom Remodel , and 1 more
"They did an amazing job, on time, finished the project on a timely manner, and his crew are very professional."
Jose M. in May 2021
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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.
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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.
Mission viejo Addition & Remodeling Contractors are rated 4.7 out of 5 based on 134 reviews of 134 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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