ADU vs Home Addition: Which Fits Your Family?

We build both, so we don't have a horse in this race. The right answer depends on one question: who is the space for?

The Quick Comparison

• Best for: Backyard ADU: A parent, grown kid or long-stay guests. Home addition: Your own household
• Privacy: Backyard ADU: Separate home, own front door. Home addition: Part of the main house
• Kitchen: Backyard ADU: Yes (Dallas usually needs a Board of Adjustment approval). Home addition: Uses the main kitchen, or a new one
• Permit path: Backyard ADU: Building permit, often plus a Board hearing. Home addition: Building permit, plus district review if you're in one
• Size limit: Backyard ADU: Usually 25% of the main house. Home addition: Lot coverage and setbacks
• Disruption: Backyard ADU: Mostly in the backyard. Home addition: Construction tied into the house
• Later uses: Backyard ADU: Guest house, office, grown kid. Home addition: More living space

See what an ADU costs and what a home addition costs.

When an ADU Wins

• A parent needs to move close but values independence. Two front doors and two kitchens keep everyone comfortable.
• You want to stay in the house during construction. Most of the work happens out back.
• You may need flexible space later. An ADU can become a guest house or office.

See backyard ADUs · See in-law suites

When an Addition Wins

• Your own family is outgrowing the house. A bigger kitchen, a primary suite or more bedrooms.
• Your backyard is small. An addition can build out a little or up a floor.
• You're in Highland Park. Detached buildings can't have kitchens there, so an attached suite is usually the way to house a parent.
• A parent needs help often. An attached suite keeps them under the same roof, with their own door.

See home additions

Build Your ADU →

What About the Permit?

In the City of Dallas, a backyard ADU with a kitchen usually needs a Board of Adjustment special exception. An addition usually doesn't, but in a conservation district it gets a design review. Both are doable. They just take different paths. See the Dallas ADU permit guide.

Which adds more value to my home?

Both add usable square footage. The bigger win is building the one your family will use for years.

Can I do both?

Yes. Some families add a primary suite to the house and build a guest house out back. We can phase them.

Which is faster?

It depends on your permit path. A Board of Adjustment hearing can add time to an ADU. A conservation district review can add time to an addition.