Online Estimate for a Home Addition
A real number for your home addition. Without the back-and-forth.
Answer eight quick questions about your home and the addition you have in mind. The instant estimate below gives you a project range based on actual home additions we’ve completed across the Phoenix metro.
No pressure to schedule. No marketing emails twice a day. Just a starting number you can plan from, so you can stop guessing whether you can actually afford this and start figuring out whether it’s the right move.
- i.A cost range built from your home and the addition you have in mind, not a generic “home addition cost in Phoenix” ballpark.
- ii.An estimated monthly payment, if you’d rather think about the project that way.
- iii.A saved link you can come back to whenever you’re ready to keep planning.
When you’re ready to talk, you’ll be working with Scott and Lorrie Hochuli (pronounced Ha-Cue-Lee), who founded the company together in 2001. Every design gets Lorrie’s final approval before it goes to construction. If you want the deeper read on what drives home addition costs in Phoenix, our Home Addition Cost in Phoenix page walks through the data, the cost drivers, and the investment tiers in detail.
Adding on and remodeling at the same time?
A lot of additions don’t stop at the new walls. The kitchen opens up to the new family room. The old primary bath becomes the guest bath. If the work is limited to where the addition meets the house, the last question in the estimator already covers it.
If your plan reaches into other rooms, our Where Do I Start? tool prices the whole project in one estimate. It also shows the shared setup savings, usually 4% to 7%, that come from building it as one project instead of two.
Estimate the Whole Project →
Getting an estimate is easy. Getting the right plan is where most home additions fall apart.
A home addition involves more decisions than most homeowners expect. Where it ties in, how it flows with the existing house, what happens to the roof line, what the foundation will allow, how new finishes can feel like they’ve always belonged. Without a plan that ties those decisions together, even thoughtful homeowners end up with an addition that’s close to what they pictured but never quite right.
A roof line that doesn’t quite work. A new room that feels added on rather than built in. Scope that grew without anyone catching it in time.
That’s where the planning conversation matters.
Here’s how we make sure your home addition starts the right way:
We sit down with you in person or by phone to talk through what you selected and the picture you have in your head of how this addition should look and feel when it’s finished. We make sure the new space flows with the rest of the house, not just sits next to it. If we meet at your home, we ask that everyone making the decision be there, so nobody has to hear it secondhand.
We talk through the choices that drive the overall investment and how each one connects to what you’re trying to accomplish. You walk out with a clear understanding of what matters most, where your money has the most impact, and how to phase or prioritize the work.
Whether you decide to move forward with us or take time to think things through, you’ll know what it takes to get the home you want and how to get there without losing the thread along the way.
If you want to get this right the first time, this is your next step.
Let’s Start the ConversationChoose a time that works for you. Takes less than 60 seconds.
Relax. You’re in safe hands.
Home addition estimate questions
How accurate is the home addition instant estimate?
The range comes from home additions we have completed across the Phoenix metro, adjusted for the type, size, bathroom, finish level, story, and how much of the existing house gets reworked. It is a planning range, not a quote.
Your firm number comes after an in-home consultation, design development, and final material selections. From there, every Hochuli project is built on a fixed-price remodeling agreement.
Where do home additions start at Hochuli?
Our home additions start around $125,000, and around $200,000 once a bathroom is part of the plan. Most land in one of three tiers: Essential at $125,000 to $200,000, Premium at $225,000 to $400,000, and All-In at $400,000 to $750,000 and up.
Why does a small addition cost more per square foot than a large one?
Foundation, engineering, permits, and the roof tie-in don’t shrink with the room. A 200 square foot addition carries most of the same fixed work as a 600 square foot one, so the cost per foot goes up as the room gets smaller.
What has the biggest effect on what a home addition costs?
The type of addition comes first. A garage, a guest bedroom, a primary suite, and a second story all start from different places. After that, the two biggest swings are a bathroom and how much of the existing house gets reworked where the addition ties in.
Does a second story addition cost more than building out?
Yes. Building up means structural reinforcement of the existing house, a new stair, and a reworked roof, so the cost per foot runs higher than a single story addition. It is usually the answer when the lot won’t allow building out.
What if I’m remodeling other rooms along with the addition?
This estimator prices the addition by itself. If your plan also includes a kitchen, bathrooms, or other rooms, the Where Do I Start? tool prices the whole project in one estimate and shows the shared setup savings, usually 4% to 7%, that come from building it as one project.
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