750 sq ft ADU Plan – Permit Ready

A 750 sq ft single-story ADU with a focused one-bedroom layout, configured for efficient circulation in a small footprint. The layout configures 1 bedroom and 1.5 baths within a clean, code-aware envelope. Practical for a backyard rental, a private guest residence, or a single-story home for an aging family member. The plan includes a covered porch.

Front 3D isometric rendering of a 750 sq ft 1-bedroom 1-story ADU plan in California — Exterior rendering of the 750 sq ft permit-ready ADU plan designed as a detached backyard cottage.

Plan A11-750 Specifications

Base area	750 sq ft
Bedrooms	1 Bedroom
Bathrooms	1.5 Bath
Stories	1-Story
Ridge height	17.25 ft
Roof slope	2:12 & 6:12
Covered porch	35 sq ft

Code & Engineering

This 750 sq ft 1-bedroom single-story ADU is delivered as a complete architectural plan set for permit-ready construction in California, developed against the requirements of Government Code §65852.2 and the supporting provisions in §65852.22.

The architectural plan set comprises the floor plan, exterior elevations, sections capturing the roof-line and interior heights, and dimensioned framing intent. The design follows the California Residential Code (CRC) and is engineered for structural detailing per ASCE 7 and the NDS.

The Structural Set package is offered as a separate scope and includes lateral analysis, gravity load takedown, shear-wall design, and component-level connection details — all sized to the specific site's seismic and wind conditions rather than to a generic California average.

The foundation system is selected during a separate site-specific design scope. Slab-on-grade is the default for level, well-drained parcels; raised crawl-space on continuous stem walls is the choice on expansive-clay or high-moisture sites; pier-and-grade-beam systems handle hillside lots and soft-soil regions where the geotechnical report calls for deeper bearing.

The plan's 17.25 ft ridge height is above the standard 16-foot detached-ADU limit but within California's 18-foot allowance for parcels within ½ mile of a major transit stop or on multifamily-zoned lots. If your parcel qualifies under those provisions, the plan is permit-ready as drawn. If the parcel doesn't qualify, several adaptations are available: plan customization to lower the roof slope or revise the upper-floor elevation so the ridge fits the standard 16-foot limit, configuration as an attached ADU with height matching the primary dwelling, or use as a small single-family residence in a zone permitting that height. Plan customization is offered as an optional design service to match the parcel's specific height envelope.

Available optional services: PE-stamped structural calculations, plan customization for site-specific adaptations (roof slope, elevation, interior layout), custom foundation design sized to the geotechnical report, structural observation visits during framing and finish, and permit support tailored to jurisdiction-specific requirements.