Garage Conversion in Sacramento, CA (2026): Cost, Permits & Rules

A garage conversion is usually the lowest-cost path to an ADU in Sacramento — $90,000-$200,000, versus $170,000-$400,000 for a new detached build — because the shell already exists.

Garage Conversion Cost in Sacramento

Converting an existing garage in Sacramento runs $90,000-$200,000. That's well under the $170,000-$400,000 typical cost of a ground-up detached ADU, because you're reusing the foundation, walls, and roof. The biggest variables are whether the slab and framing are sound, what utility/electrical upgrades are needed, and your finish level. Permit fees add City fee estimate form CDD-0419 (rev. 7/12/2026), at a $170.80 per sq ft valuation: about $5,272 total for a 749 sq ft new detached ADU, $10,624 at 750 sq ft and $14,843 at 1,200 sq ft. Line items at 1,200 sq ft: building permit $1,790.36, plan review $751.95, fire administrative $176, fire inspection $294 ($0.11 per sq ft, $294 minimum), fire plan review $260, planning inspection $526, planning review $263, public works and utilities review $205 deposit each plus hourly, construction excise tax $945.60, general plan fee $533 ($2.60 per $1,000 of valuation), residential construction tax $315, technology fee $254.23. Not included: school district fees (paid to the district, form CDD-0226), regional sanitation and county sewer fees, and any water or sewer tap, housing or project-area impact fees. Optional ADU Zoning Review: $0 (was $117 before July 2026). Optional written fee estimate: $164 (form CDD-0278). Extra review time bills at $216 per hour for Building and $263 per hour for Planning. A converted unit rents for about $1,500-$1,850/mo (1BR) in Sacramento.

The Sacramento Garage Conversion Permit Process

A garage-to-ADU conversion in Sacramento needs building permits even if the exterior is unchanged. Approval process: Ministerial building permit; no hearing or discretionary review for a code-compliant unit (17.228.105(B)(4)). In order: 1) confirm your zone and any historic or airport overlay in the Land Information Lookup App; 2) optional free ADU Zoning Review (form CDD-0009, filed through the E-Planning portal) so Planning checks setbacks, height, coverage and historic standards before you pay for construction drawings; 3) tree permit if a protected tree is affected (City Code Ch. 12.56); 4) file the building permit set through Electronic Plan Check with a scaled site plan, structural, electrical, Title 24 energy, CALGreen and solar sheets (paper sets of 11 x 17 in. or larger still accepted at the counter); 5) Building routes the set to Planning, Fire, Public Works and Utilities; 6) request an address for each ADU (form CDD-0104, up to four weeks); 7) pay fees at permit pickup. The Planning Division's ADU portal says no separate planning approval is needed before applying, while the Building Division's ADU handout (CDD-0423, rev. 1/29/2026) still says planning approval or an approved concurrent-review MOU must be obtained first; ask the Building Division (ezpermit@cityofsacramento.org) which applies to your submittal. A unit that misses a local standard may apply for discretionary Site Plan and Design Review under Ch. 17.808 (17.228.105(B)(5)) The review timeline is 60 days by law: the city must approve or deny a complete application within 60 days when there is an existing home on the lot, or the ADU is deemed approved (17.228.105(B)(4)(b)-(c), matching SB 543). If the ADU is filed with a permit for a new house the city may wait until the house is approved, and any delay you request stops the clock. Published targets (ADU portal, Step 5): optional zoning review 1-3 weeks; building plan review roughly 1.5-2 months, with review cycle 1 at 20 business days, cycle 2 at 15 and cycle 3 at 5, not counting your time to answer corrections. State law gives a 30-day decision for an application that uses a city-preapproved plan or one identical to a plan approved in the current building-code cycle (Gov. Code 65852.27(b)); ask the Building Division whether a Shelf Ready plan qualifies, with plan check: Electronic Plan Check through the city's online permit portal. A detached ADU needs no fire sprinklers if the main house is unsprinklered and the ADU, excluding garage, is 1,200 sq ft or less; an attached ADU is exempt if the house is unsprinklered, the addition is no more than 50% of the original and the total stays under 3,600 sq ft. One water service per lot: the ADU ties into the house's water and sewer lines and normally needs no separate meter (City Code 13.04.070). Rooftop solar may be required under the California Energy Code; SMUD offers a free service consultation (CDD-0423, CDD-0009). Pre-approved plans: Yes, two programs. 1) Shelf Ready ADU Plans: three free city-designed detached plans, all-electric and built to the 2022 Residential Code, updated December 2025: studio 367 sq ft, one-bedroom 559 sq ft, two-bedroom 747 sq ft. Mirroring is allowed, other changes are not, and you supply the site plan. All three stay under the 750 sq ft impact-fee threshold. 2) AB 1332 Preapproved ADU Program for third-party detached plans (Gov. Code 65852.27): the process exists but the city's catalog listed no plans as of September 19, 2026. Either route still needs site-specific zoning and building review.

Confirm eligibility — ADUs are allowed in Any lot in a zone that lists 'Dwelling unit, accessory' and 'Dwelling unit, junior accessory' as accessory uses, which includes the R-1 and R-2 residential zones (SCC 17.204.210(C), 17.204.510(C)), provided the lot already has, or is concurrently building, a single-unit, duplex or multi-unit dwelling (17.228.105(B)(2)(a)(i)); under the state option, any residential or mixed-use zone (17.228.105(C)(1)). Exceptions: no ADUs in the Executive Airport clear zone EA-1, and only one ADU or JADU per lot in the EA-2 and EA-3 approach zones (17.312.060). In a historic district or on a landmark property a local-option ADU must also meet the city's ADU Design Standards for Historic Properties (17.228.105(B)(2)(c)(vi)). Check your zone and overlays in the city's Land Information Lookup App.
Prepare conversion plans — layout, egress windows, insulation, ventilation, smoke/CO detectors, plus a kitchen and bathroom.
Submit for plan check — Electronic Plan Check through the city's online permit portal. A detached ADU needs no fire sprinklers if the main house is unsprinklered and the ADU, excluding garage, is 1,200 sq ft or less; an attached ADU is exempt if the house is unsprinklered, the addition is no more than 50% of the original and the total stays under 3,600 sq ft. One water service per lot: the ADU ties into the house's water and sewer lines and normally needs no separate meter (City Code 13.04.070). Rooftop solar may be required under the California Energy Code; SMUD offers a free service consultation (CDD-0423, CDD-0009).
Pull permits and build — fees run City fee estimate form CDD-0419 (rev. 7/12/2026), at a $170.80 per sq ft valuation: about $5,272 total for a 749 sq ft new detached ADU, $10,624 at 750 sq ft and $14,843 at 1,200 sq ft. Line items at 1,200 sq ft: building permit $1,790.36, plan review $751.95, fire administrative $176, fire inspection $294 ($0.11 per sq ft, $294 minimum), fire plan review $260, planning inspection $526, planning review $263, public works and utilities review $205 deposit each plus hourly, construction excise tax $945.60, general plan fee $533 ($2.60 per $1,000 of valuation), residential construction tax $315, technology fee $254.23. Not included: school district fees (paid to the district, form CDD-0226), regional sanitation and county sewer fees, and any water or sewer tap, housing or project-area impact fees. Optional ADU Zoning Review: $0 (was $117 before July 2026). Optional written fee estimate: $164 (form CDD-0278). Extra review time bills at $216 per hour for Building and $263 per hour for Planning; then framing, electrical, plumbing, and final inspection.

No Replacement Parking Required

No. California law (AB 68 / Gov Code §66314) prohibits cities from requiring replacement parking when you convert or demolish a garage to build an ADU — so you do not need to add a parking space anywhere on the lot. Owner-occupancy is not required, so you can rent the converted unit out.

The JADU Option for an Attached Garage

If your garage is attached to the house, you can convert it into a junior ADU (JADU) — capped at 500 sq ft, inside the walls of a single-unit dwelling including an attached garage, with its own outside entrance and an efficiency kitchen with a cooking appliance, counter and cabinets. A JADU without its own bathroom must also keep an interior door to the main house. A deed restriction barring separate sale must be recorded before final inspection (17.228.105(B)(3)) and built within the existing walls. JADUs are cheaper and faster to permit than a full ADU, though they may share sanitation with the main home. A full ADU gives you more size and a separate unit; a JADU is the budget route.

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Sacramento Garage Conversion FAQ

How much does a garage conversion cost in Sacramento?

A garage conversion in Sacramento typically costs $90,000-$200,000 — well below the $170,000-$400,000 cost of a new detached ADU, because the foundation, walls, and roof already exist. Budget separately for permit fees (City fee estimate form CDD-0419 (rev. 7/12/2026), at a $170.80 per sq ft valuation: about $5,272 total for a 749 sq ft new detached ADU, $10,624 at 750 sq ft and $14,843 at 1,200 sq ft. Line items at 1,200 sq ft: building permit $1,790.36, plan review $751.95, fire administrative $176, fire inspection $294 ($0.11 per sq ft, $294 minimum), fire plan review $260, planning inspection $526, planning review $263, public works and utilities review $205 deposit each plus hourly, construction excise tax $945.60, general plan fee $533 ($2.60 per $1,000 of valuation), residential construction tax $315, technology fee $254.23. Not included: school district fees (paid to the district, form CDD-0226), regional sanitation and county sewer fees, and any water or sewer tap, housing or project-area impact fees. Optional ADU Zoning Review: $0 (was $117 before July 2026). Optional written fee estimate: $164 (form CDD-0278). Extra review time bills at $216 per hour for Building and $263 per hour for Planning) and any electrical or utility upgrades the conversion triggers.

Do I need a permit to convert a garage in Sacramento?

Yes. Converting a garage to a living unit in Sacramento requires building permits even if the exterior stays the same — the work has to meet code for insulation, egress, ventilation, electrical, and a kitchen/bathroom. The ADU permit timeline is 60 days by law: the city must approve or deny a complete application within 60 days when there is an existing home on the lot, or the ADU is deemed approved (17.228.105(B)(4)(b)-(c), matching SB 543). If the ADU is filed with a permit for a new house the city may wait until the house is approved, and any delay you request stops the clock. Published targets (ADU portal, Step 5): optional zoning review 1-3 weeks; building plan review roughly 1.5-2 months, with review cycle 1 at 20 business days, cycle 2 at 15 and cycle 3 at 5, not counting your time to answer corrections. State law gives a 30-day decision for an application that uses a city-preapproved plan or one identical to a plan approved in the current building-code cycle (Gov. Code 65852.27(b)); ask the Building Division whether a Shelf Ready plan qualifies, and the process is: Ministerial building permit; no hearing or discretionary review for a code-compliant unit (17.228.105(B)(4)). In order: 1) confirm your zone and any historic or airport overlay in the Land Information Lookup App; 2) optional free ADU Zoning Review (form CDD-0009, filed through the E-Planning portal) so Planning checks setbacks, height, coverage and historic standards before you pay for construction drawings; 3) tree permit if a protected tree is affected (City Code Ch. 12.56); 4) file the building permit set through Electronic Plan Check with a scaled site plan, structural, electrical, Title 24 energy, CALGreen and solar sheets (paper sets of 11 x 17 in. or larger still accepted at the counter); 5) Building routes the set to Planning, Fire, Public Works and Utilities; 6) request an address for each ADU (form CDD-0104, up to four weeks); 7) pay fees at permit pickup. The Planning Division's ADU portal says no separate planning approval is needed before applying, while the Building Division's ADU handout (CDD-0423, rev. 1/29/2026) still says planning approval or an approved concurrent-review MOU must be obtained first; ask the Building Division (ezpermit@cityofsacramento.org) which applies to your submittal. A unit that misses a local standard may apply for discretionary Site Plan and Design Review under Ch. 17.808 (17.228.105(B)(5))

Do I have to replace the parking if I convert my garage in Sacramento?

How long does a garage conversion take in Sacramento?

Plan on 60 days by law: the city must approve or deny a complete application within 60 days when there is an existing home on the lot, or the ADU is deemed approved (17.228.105(B)(4)(b)-(c), matching SB 543). If the ADU is filed with a permit for a new house the city may wait until the house is approved, and any delay you request stops the clock. Published targets (ADU portal, Step 5): optional zoning review 1-3 weeks; building plan review roughly 1.5-2 months, with review cycle 1 at 20 business days, cycle 2 at 15 and cycle 3 at 5, not counting your time to answer corrections. State law gives a 30-day decision for an application that uses a city-preapproved plan or one identical to a plan approved in the current building-code cycle (Gov. Code 65852.27(b)); ask the Building Division whether a Shelf Ready plan qualifies for permit review (Electronic Plan Check through the city's online permit portal. A detached ADU needs no fire sprinklers if the main house is unsprinklered and the ADU, excluding garage, is 1,200 sq ft or less; an attached ADU is exempt if the house is unsprinklered, the addition is no more than 50% of the original and the total stays under 3,600 sq ft. One water service per lot: the ADU ties into the house's water and sewer lines and normally needs no separate meter (City Code 13.04.070). Rooftop solar may be required under the California Energy Code; SMUD offers a free service consultation (CDD-0423, CDD-0009) for plan check), then construction. A garage conversion is usually faster to build than a ground-up ADU because the structure already exists.

Can I convert an attached garage into a JADU in Sacramento?

If the garage is attached to the house, yes — a junior ADU (JADU), capped at 500 sq ft, inside the walls of a single-unit dwelling including an attached garage, with its own outside entrance and an efficiency kitchen with a cooking appliance, counter and cabinets. A JADU without its own bathroom must also keep an interior door to the main house. A deed restriction barring separate sale must be recorded before final inspection (17.228.105(B)(3)), can be carved out of the existing footprint, which includes an attached garage. JADUs are cheaper but may share sanitation with the main home.

Compare your options: see the full Sacramento ADU rules, estimate your build with the Sacramento ADU cost calculator, or read the general garage conversion guide.

Garage Conversion in Sacramento, CA: Cost, Permits & Rules (2026)