Home Addition Cost in Southern California, California ()
Home addition cost in Southern California, California ranges from $149 to $298 per square foot. Standard grade construction is represented by the lower end of this range and premium grade construction is represented by the upper end of this range. Luxury grade construction could be as much as twice the cost of the upper end of this range. To get a more accurate cost for your home addition project, request a quote. Please note that if you use our matching service, we may be compensated.
Topics Covered in this Guide: Home Addition Cost | Home Addition Cost Factors | Frequently Asked Questions | Related Cost Guides | Find Home Addition Contractors | Home Addition Cost in Your Area
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How Much Does Home Addition Cost in Southern California, CA?
Home addition cost in Southern California, California ranges from $149 to $298 per square foot. Standard grade construction is represented by the lower end of this range and premium grade construction is represented by the upper end of this range. Luxury grade construction could be as much as twice the cost of the upper end of this range. Consult with a contractor to discuss the pros and cons of different construction grades.
This guide is intended to provide you an approximate home addition cost in Southern California, CA. To get a more accurate quote for your specific project, request a free estimate. Our research, although general in nature, does include feedback provided by home addition contractors and research conducted by the HomeBlue staff.
Home addition cost based on the size of the addition:
- 12x12 addition cost (144-sf): $21,000 to $43,000.
- 20x20 addition cost (400-sf): $60,000 to $119,000.
- 20x30 addition cost (600-sf): $89,000 to $179,000.
- 20x40 addition cost (800-sf): $119,000 to $238,000.
- 25x40 addition cost (1,000-sf): $149,000 to $298,000.
- Note: The lower end of these ranges represents standard grade construction and the upper end represents premium grade.
- Note: Luxury grade construction in high cost areas could be as much as double the upper end of these ranges.
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Factors that Influence House Addition Cost in Southern California
When addition contractors come to your house to provide you an estimate, they will consider a number of factors that can increase or decrease the cost of your project. Pricing for your home addition project will vary based on the quality of construction you choose, the size of your addition, and the topography of the site. Here are a few things to keep in mind when you get quotes from house addition contractors:
Your prices may be higher when:
- You want premium or luxury grade construction.
- The addition requires a foundation.
- The property is historic and requires special approvals.
- The house is occupied.
- A basement needs to be dug.
- The site has a significant slope or is rocky.
- The property is in a hard to reach location (more travel time).
- The property is in a high cost area.
Your prices may be lower when:
- You want standard grade construction.
- No foundation is required.
- The house is vacant.
- The addition does not have a basement (it is constructed on-grade).
- The property is easily accessible (less travel time).
- The property is in a lower cost.
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Home Addition FAQs
Here are a few frequently asked questions related to home addition construction:
You can find home addition contractors in Southern California by 1) asking a neighbor for a referral, 2) searching for “home addition contractors” in your favorite search engine, 3) using a traditional paper directory resource (yellow pages), 4) looking for ads on your local TV station, 5) using an online matching service.
In general, hiring an architect or designer to prepare construction documents is likely necessary. The structural elements of the building will need to be designed and stamped by a licensed structural engineer. If you need to do foundation work, you may also need a civil engineer to make sure the site is properly graded. You can ask your builder if they could assist you with the design process (ie: do the project using a design/build approach) or whether they would prefer you hire an architect separately to prepare drawings. Either way, the final design documents will then need to be submitted to your local permit office for approval.
Building a home or an addition requires a contractor’s license in most localities. However, many localities provide exemptions when property owners choose to serve as the general contractor for a property that they own. You will need to research your local laws. For instance, here is a link to a Florida statute addressing owner-builder exemptions. There are pros and cons relating to serving as an owner-builder. For instance, you will assume many of the responsibilities and liabilities associated with the project.
It is highly likely that you will need a building permit to build a home addition. Discuss the permit process with the contractors you are considering for the project. A seasoned and reputable contractor should be comfortable and willing to help guide you through the process or willing to handle the task as part of their contract.
20x20 room addition cost in Southern California ranges from $60,000 to $119,000 depending on the grade of construction used. Standard grade will be at the lower end of this range and Premium grade will be at the upper end of this range. To get a more accurate cost for your specific project, request a quote from a local contractor.
12x12 room addition cost in Southern California ranges from $21,000 to $43,000 depending on the grade of construction used (standard is at the bottom end of this range and premium grade is at the top end of this range). To get a more accurate cost for your room addition project, request a quote from a local contractor.
The cost to add a second story in Southern California ranges from $149 to $298 per square foot depending on the grade of construction used (standard is at the lower end of this range and premium grade is at the upper end of this range). To get a more accurate cost, request a quote from a local contractor.
Related Cost Guides
We have researched several other closely related projects. If one of these projects better represents the type of project you are undertaking, please check out the appropriate guide:
- Building a new house? Home Building Cost Guide for Southern California, CA
- Building a barndominium? Barndominium Cost Guide for Southern California, CA
- Remodeling a bathroom? Bathroom Remodeling Cost Guide for Southern California, CA
- Remodeling a kitchen? Kitchen Remodeling Cost Guide for Southern California, CA
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Local Home Addition Contractors Near Southern California, CA
The following are a few contractors in your area. Note that these companies have not been screened or vetted by HomeBlue. Please conduct proper due diligence prior to hiring these or any other company you may select.
California Home Builders California Home Builder is a family possessed business: Licensed, Insured and Compensated, and Bonded. Years in business, interestingly situated to meet short and long haul Construction/home Remodeling Service needs. Our Company us a main give of administration to the whole Planning, Pre-Construction handle. We make positive and critical encounters with enduring connections due to our activity are guided by our care values.
Cavalier Builders inc Since 1999, our family-owned and operated remodeling contractor company, Cavalier Builders, has provided services such as room additions, kitchen, and bathroom remodeling, interior/exterior painting, roofing, patio work, complete plastering, construction, and more in the Los Angeles area. Our builders renovate homes every day and are fully qualified to handle any service you need. For a complete listing of the construction, remodeling, and renovation services Cavalier Builders offers in Los Angeles, learn more about our services.
Sea Pointe Design & Remodel Specializing in kitchen design & remodeling, bathroom remodeling, and whole home remodeling, Sea Pointe Design & Remodel’s comprehensive approach to remodeling unifies design and construction, offering clients a single point of contact and all-inclusive project pricing. With unsurpassed attention to detail and diligent project planning, Sea Pointe Design & Remodel keeps your home remodeling project on schedule and within budget. Through our commitment to service and quality construction, the Sea Pointe Design & Remodel team of award-winning designers, expert project managers, and skilled craftsmen strive to provide our clients with a most positive, successful, and fun.
So Cal Design Build, Inc So Cal Design Build is a family-owned, 4th generation Building & Remodeling company. We believe that honesty and open communication, with our clients, is key to customer satisfaction and retention. Our business model creates an interactive dialog from inception to the completion of your project, which allows for greater flexibility and adjustments as needed. As local business owners, we believe that giving back to our community is a personal responsibility.
Home Addition Cost Estimates
Find addition contractors in just 3-5 minutes. Tell us what you are looking for and receive free cost estimates without any obligation.
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Find Home Addition Cost in Your Area
House addition cost varies from area to area. We have developed a number of home addition cost guides to help you identify the room addition cost near you.
- How to Get Home Addition Price Quotes
- How to Get Matched to Home Addition Contractors
- Search for Home Addition Cost in Your City
- Home Addition Cost Guide (National Averages)
- Home Addition Cost in Sparks, NV