Conditioned Square Footage vs. Square Footage Under Roof: What Homeowners Need to Know

Conditioned Square Footage vs. Square Footage Under Roof: Why It Matters for Your Custom Home

When planning your dream home, it’s easy to get confused by industry jargon — especially when it comes to square footage. Many architects and builders calculate costs based on the total square footage under roof, while most homeowners think in terms of the conditioned (livable) square footage.

Understanding the difference can help you avoid surprises, get accurate quotes, and make the best decisions for your investment.

What Is Conditioned Square Footage?

Conditioned square footage refers to the areas of your home that are heated and cooled — your indoor living spaces. Bedrooms, kitchens, bathrooms, and living rooms all fall under this measurement.

This is the number you’re likely to care about when you think about the space you’ll use every day.

What Does Square Footage Under Roof Include?

The square footage under roof is a broader measurement. It includes everything covered by your home’s roofline — not just the livable areas. This can add up fast when you factor in:

• Garages
• Covered porches
• Patios
• Breezeways
• Eaves

Builders often calculate costs and fees using the square footage under roof because these areas still require materials, labor, and design considerations. On average, this can add up to 25% to the total square footage and budget compared to conditioned space alone.

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Why This Difference Matters When Getting a Quote

If you’re comparing bids or looking at building costs, it’s crucial to confirm which square footage measurement your builder is using. You don’t want to think you’re paying for 3,000 square feet of livable space only to discover that includes a big garage and porch.

At Rivendale Homes, we quote our fees and building prices based on conditioned square footage — the metric our customers understand and actually live in. This keeps expectations clear, helps you budget smarter, and builds trust.

The Takeaway

Before signing any agreement with a builder or architect, ask the simple but important question:

“Is this based on conditioned square footage or total square footage under roof?”

Being clear upfront can help you compare apples to apples, stay within budget, and feel confident about your new custom home.

Ready to Build Smarter?

At Rivendale Homes, we believe clarity builds trust. Our team is here to guide you through every step — from design to move-in — with total transparency.

Let’s make your dream home a reality.
📞 Call us at (512) 865-5369 or visit rivendalehomestexas.com to get started today!