The Tustin, 750 sq ft Two-Bedroom ADU Floor Plan

The Tustin at a glance

*Estimated 2026 range for a custom detached build at our published rates ($270–$380/sq ft). Final pricing depends on site conditions, panel, utilities, slope, access. Run your lot in the cost calculator.

How this plan lives

The second bedroom changes who can live in the unit, and that changes everything about how it rents. A one-bedroom serves singles and couples; the Tustin serves a parent with a kid, two roommates splitting rent, or grandparents who want a guest room for the grandkids. Wider market, steadier occupancy.

Inside 750 square feet the discipline is the shared bathroom, one bath serving two bedrooms keeps the plan efficient and the budget honest. The bedrooms sit apart from each other rather than wall-to-wall, which roommates in particular will thank you for.

This is also the plan we reach for when the ADU’s first job is family, not rent: a mother-in-law today, a rental in five years. Two bedrooms keep both futures open, which is exactly what you want from a building that outlasts its first purpose.

Two comparisons decide whether 750 sq ft is right. Below it, the Balboa at 550 sq ft serves singles and couples and stays under the 750 sq ft impact-fee line entirely, which is a real cost difference rather than a rounding one. Above it, the Newport at 1,000 sq ft gives a second living area and sits at the size floor state law protects for two-bedroom units. The Laguna covers the tightest lots. Full set in the floor-plan comparison.