Home Addition Cost in Los Angeles, California ()

Home addition cost in Los Angeles, California ranges from $143 to $286 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.

Home Addition Cost
By HomeBlue Team
April 13, 2023 02:07 PM

Topics Covered in this Guide: Home Addition Cost | Home Addition Cost Factors | Frequently Asked Questions | Related Cost Guides | Find Home Addition Contractors

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How Much Does Home Addition Cost in Los Angeles, CA?

Home addition cost in Los Angeles, California ranges from $143 to $286 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 Los Angeles, CA. To get a 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.

House addition cost based on the size of the addition:

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Factors that Influence House Addition Cost in Los Angeles

When addition contractors come to provide you an estimate, they will consider several 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. Here are a few things to keep in mind when you get quotes from house addition contractors:

Your prices may be higher when:

Your prices may be lower when:

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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 Los Angeles 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.

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Find Home Addition Contractors in Los Angeles

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.

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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.

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Discuss Your Options with a Contractor in Los Angeles

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.

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Get Matched to a Home Addition Contractors in Los Angeles

20x20 room addition cost in Los Angeles ranges from $57,000 to $115,000 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.

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Get Estimates from Home Addition Contractors in Los Angeles

12x12 room addition cost in Los Angeles ranges from $21,000 to $41,000 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.

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Get Quotes from Home Addition Contractors in Los Angeles

The cost to add a second story in Los Angeles ranges from $143 to $286 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.

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Cost Estimates from Home Addition Contractors in Los Angeles


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:

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Local Home Addition Contractors Near Los Angeles, 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.

Room Addition Contractor Los Angeles Your home is your sanctuary, and the protector of your loves ones and your precious possessions. It’s also likely the most valuable thing you own, so it’s no wonder you love your home, and there is only one thing better – more of it. We are Room Addition Los Angeles, and we can help you expand the size and scope of your house. We have helped more Los Angelenos realize their home addition dreams than anyone else in the business.

Adar Builders Inc Our clients know us as a forward-thinking, innovative, and exceedingly skilled family construction and remodeling business. While we cherish this reputation, our building and contracting company in Los Angeles took hard work and grit to get to where we are now. To this day, Adar Builders has a 100% client satisfaction rating. We aim to keep up the good work, grow our firm, and retain the distinctive attention to detail that has made us so successful thus far.

AP Remodeling Inc. AP Remodeling started its journey in a humble way in Los Angeles, CA, some years ago. Today, it is a name to reckon in the exclusive domain of home remodeling, improvement & space management. Our expert LA home remodelers & renovators make it a point to deliver any home improvement project on-time, irrespective of the size, complexity and budget of a said activity.

Oasis Builders, Inc. Your home is your castle, and it should reflect your sense of style. To that end, the home remodeling experts at Oasis Bulders are here for you, whether you are starting a new home construction or looking for remodeling contractors to transform your existing space. Under one roof, our construction company brings together talented designers and architects to take your house renovation ideas and make them reality.

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