Placer County · Pre-reviewed accessory dwelling plans

Placer County pre-approved ADU plans. We build them.

Placer County keeps a library of pre-reviewed ADU plans, shared with neighboring foothill jurisdictions, and also runs a state-required (AB 1332) pre-approved plan program. The plans include foundation and snow-load engineering.

5plans
661–1,194 sq ftsizes
$265,000starting at
Buy from the plan ownerhow you get them

See the plans Check my lot

An ADU we built in Roseville.

The plans

Pre-reviewed accessory dwelling plans

01661 sq ft
NC ADU_1
One bedroom over a garage. Priced after we review the plan set.
Price After plan review
02746 sq ft
NC ADU_2
Two bedrooms, garage optional.
Starting at $287,000
031,194 sq ft
NC ADU_3
Three bedrooms, garage optional.
Starting at $416,000
Price assumes two bathrooms. The Placer County page doesn't list bath counts, so we'll confirm from the plan set.
04661 sq ft
One bedroom, single story
One bedroom, one bath, no garage.
Starting at $265,000
05749 sq ft
WCH ADU 749
Two bedrooms, one bath, garage optional.
Starting at $288,000

Check the County's page for which plans are current before you buy one.

Get the plans from Placer County Have us check which fits

What "starting at" covers

Starting prices are for the building itself on a straightforward lot. Every lot is different, so we confirm the real number in a written, line-by-line budget after we walk your property.

The building, slab to final inspection, on a flat lot with normal access
Fiber-cement lap siding, comp shingle roof, vinyl windows
Kitchen with quartz counter and appliances, full bath with tub
Ductless mini-split and heat-pump water heater
Sewer and water connections up to 50 ft from the main house

Not included

The garage on plans where it's optional
Plan purchase from the plan's owner
Solar (PV) system and fire sprinklers, if required
City permit, plan check, impact and school fees
Title 24 and HERS testing fees
The underground electrical feed from your main panel (priced after the walkthrough)
Sewer or water runs over 50 ft, a sewer pump, or an electrical panel upgrade
Stucco exterior (the plans' other siding option)
Grading, retaining walls, tree removal and landscaping

Good to know

Where it applies: Placer County's building jurisdiction. Some nearby cities, like Lincoln, also accept some of these plans.

Getting the plans: Bought from the plan's owner, listed under each plan on the County's page. Details and downloads are on Placer County's pre-reviewed ADU plans page. We'll confirm each point for your lot at the walkthrough.