Home Addition Cost in Santa Clara, California ()

Home addition cost in Santa Clara, 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.

Home Addition Cost
By HomeBlue Team
June 06, 2024 12:05 PM

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 Santa Clara, CA?

Home addition cost in Santa Clara, 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 Santa Clara, 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:

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Factors that Influence House Addition Cost in Santa Clara

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:

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 Santa Clara 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 Santa Clara

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 Santa Clara

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 Santa Clara

20x20 room addition cost in Santa Clara 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.

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Get Estimates from Home Addition Contractors in Santa Clara

12x12 room addition cost in Santa Clara 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.

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Get Quotes from Home Addition Contractors in Santa Clara

The cost to add a second story in Santa Clara 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.

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Cost Estimates from Home Addition Contractors in Santa Clara


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 Santa Clara, 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.

Done Right Home Remodeling We’re San Jose’s veteran general remodeling contractor. At Done Right Home Remodeling, we take pride in calling ourselves the top-rated general home contractors. At Done Right Home Remodeling, we offer fully customized solutions in the exclusive domain of general remodeling and home improvement services. Our mission is to provide dream living spaces to homeowners, without making any compromise on visual aesthetics, original layout design, style, space & functionality.

Home Quality Remodeling There are a lot of moving parts to remodeling a home. We work together as a team to give you the best we possibly can. We can handle any space a kitchen, bathroom, or house. Whether you're a homeowner or a buyer, your space requires constant upgrades to make it your safe haven, but it's a risky business. Fret not. Our team is here to support you throughout the home renovation process.

Giant Builders Inc With more than 15 years in the industry, Giant Builders began from a small family-owned business to a large organization offering remodeling, in-house construction, sustainable energy, and design & build. Giant Builders focus on furnishing you with custom home improvement arrangements that fit your way of life and objectives. Regardless of whether you want a significant home fix, restorative fix, or are prepared to rebuild or add to your residing space we can help.

GADI Construction GADI Construction Company treat your home like we would treat our own. Perhaps one of your most valuable assets, your home deserves trusted professionals and we take pride in holding such a reputation. We know what works best, what a quality job looks like, and how to get it done on time and most importantly within budget. Excellent communication is essential for building strong and trusted working relationships with our customers, so you will know what is going on at every step of the process.

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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.