Home Addition Cost in Renton, Washington ()
Home addition cost in Renton, Washington ranges from $137 to $274 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
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How Much Does Home Addition Cost in Renton, WA?
Home addition cost in Renton, Washington ranges from $137 to $274 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 Renton, WA. 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:
- 12x12 addition cost (144-sf): $20,000 to $39,000.
- 20x20 addition cost (400-sf): $55,000 to $110,000.
- 20x30 addition cost (600-sf): $82,000 to $164,000.
- 20x40 addition cost (800-sf): $110,000 to $219,000.
- 25x40 addition cost (1,000-sf): $137,000 to $274,000.
- 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 Renton
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:
- 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 Renton 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 Renton ranges from $55,000 to $110,000 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 Renton ranges from $20,000 to $39,000 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 Renton ranges from $137 to $274 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 Renton, WA
- Building a barndominium? Barndominium Cost Guide for Renton, WA
- Remodeling a bathroom? Bathroom Remodeling Cost Guide for Renton, WA
- Remodeling a kitchen? Kitchen Remodeling Cost Guide for Renton, WA
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Local Home Addition Contractors Near Renton, WA
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.
Wise Choice Construction, LLC - General Contractor Company in Seattle Every homeowner's goal is to have the pleasure of walking into their home and thinking how lucky they are to live there. The thought of moving into a new home that's more modern may continue to be at the top of your mind, but the effort of finding a new neighborhood that you love can be daunting. Updating your current home to the latest trends, finishes, and technology can give you that amazing home feeling without having to relocate and start over.
United Builders United Construction is the number one Seattle construction company in Washington servicing areas such as Bellevue, Kent, Renton and throughout King County. Specializing in both home remodeling, bathroom remodel and home additions. As a Seattle custom home builders, United Construction will help you create the home of your dreams – just the way you want it.
ANK Construction Inc Trust our experience to get the job done. We have over 22 years of experience in the industry. We buy our products from industry leading manufacturers and most of them carry warranties. We truly value the state of all our clients homes. That's why we are 100% licensed and insured to protect your safety and ours.
EVERGREEN PRO REMODELING Evergreen Pro Remodeling Inc. is a full-service home renovation company specializing in kitchen and bathroom remodels, basement, additions and many other contractor services. Our mission is to be the leader in customer satisfaction for home remodels in the King County & Pierce County and Greater Tacoma-Seattle-Everett Metro. We know you have many choices available for remodeling contractors near you and we hope you’ll consider working with our talented team when planning your custom home improvement.
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Related Pages
- How to get home addition price quotes
- How to get matched to home addition contractors
- Home Addition Cost Guide
- Home Addition Cost in Reston, VA