Home Addition Cost Guide ()

Home addition cost ranges from $100 to $328 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
December 13, 2023 04:45 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 Contractors Near You


Find local home addition contractors in just 3-5 minutes. Tell us what you are looking for and receive free cost estimates without any obligation.

Free Cost Estimates

How Much Does Home Addition Cost?

Home addition cost ranges from $100 to $328 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. 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:

Free Quotes from Home Contractors


Find home contractors in just 3-5 minutes. Tell us what you are looking for and receive free cost estimates without any obligation.

Click to Get Quotes

Factors that Influence House Addition Cost

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:

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.

Get Cost Estimates

Home Addition FAQs

Here are a few frequently asked questions related to home addition construction:

You can find home addition contractors 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.

LEARN MORE:
Find Home Addition Contractors

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.

LEARN MORE:
Find an Architect

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.

LEARN MORE:
Discuss Your Options with a Contractor

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.

LEARN MORE:
Get Matched to a Home Addition Contractors

20x20 room addition cost ranges from $40,000 to $131,000 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.

LEARN MORE:
Get Estimates from Home Addition Contractors

12x12 room addition cost ranges from $14,000 to $47,000 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.

LEARN MORE:
Get Quotes from Home Addition Contractors

The cost to add a second story ranges from $100 to $328 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.

LEARN MORE:
Cost Estimates from Home Addition Contractors


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:

Get Home Addition Quotes


Find home addition contractors in just 3-5 minutes. Tell us what you are looking for and receive free cost estimates without any obligation.

Free Cost Estimates

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.