City guide

Building a backyard home in Denton

The CITY of Denton has some of the clearest ADU rules in North Texas. (This covers Denton city limits only — Denton-County suburbs like Flower Mound, Little Elm, and Lewisville each have their own rules.)

What Denton allows

ADU size

Up to 800 sq ft or 75% of the main home's size — whichever is GREATER.

Parking

No additional parking required (but any main-home parking you remove must be replaced on site).

Placement

Detached ADUs go to the side or rear, at least 3 ft behind the front building line; 3 ft minimum from rear/side property lines.

Design

If visible from the street, the ADU must match the main home on at least two of: color, roof pitch, material orientation, architectural detail.

Utilities & permits

Shares the main property's water/sewer service; permits filed through the city's eTRAKiT portal.

The catch most people miss

The design-compatibility rule surprises people: a visible ADU can't look like a shed dropped in the yard. Modular or panelized units can meet it with the right finish choices — worth planning for before you pick a unit.

What it costs

The unit price you see advertised — the number on an online listing for the structure itself — is only part of the real cost: site work, utilities, permits, and delivery/crane are the rest. Check your property for a rule-based upper bound, then request help and we'll connect you with independent local professionals who can price the real number for your address.

Rules verified 2026-07-12 from City of Denton — Accessory Dwelling Unit (ADU). General guidance, not a determination for a specific property — zoning overlays, planned developments, and HOA/deed restrictions are address-specific.