Folsom, CA · Sacramento County
Garage Conversion ADU in Folsom
Upside ADU builds garage conversion adus in Folsom, Sacramento County, for a $1,000 deposit with transparent fixed pricing and inspection-tied payments. A typical Folsom garage conversion runs $75,240–$190,960 all-in, and we permit it through the City of Folsom Community Development Department end to end.
Folsom rules that affect a garage conversion
Older Folsom neighborhoods have plenty of detached and attached garages, and a conversion that stays inside the existing footprint usually needs no added setbacks — but the City of Folsom Community Development Department will want fire-separation, egress, and insulation brought up to code, which we scope before you sign.
Local permitting: Folsom's Community Development Department applies 4 ft side/rear setbacks and a 16 ft height cap, but the city's hillside and master-planned (Folsom Ranch) lots often add grading, retaining, or fire-zone requirements we scope up front. HOA review is common south of Highway 50.
That's the garage conversion-specific picture. For the full Sacramento County rulebook — every setback, height, and owner-occupancy detail — see our Sacramento-region ADU rules guide, and learn how the build type works statewide on our garage conversion adu page.
Why Folsom homeowners pick Upside
- $1,000 deposit — the CA legal max
- Inspection-tied milestone payments
- We know the City of Folsom Community Development Department process
- Transparent, all-in Folsom pricing
- Property-manager referral when you rent
Folsom garage conversion cost snapshot
Converting an attached or detached garage reuses an existing foundation and walls, making it the most affordable way to add a legal ADU. No added parking is required in Sacramento. In the Sacramento County market that prices out to about $198–$308 per square foot, or $75,240–$190,960 for a finished, permitted unit. A typical Folsom garage conversion rents for $1,900–$3,000 a month.
| Size | Typical use | Folsom all-in cost (2026) |
|---|---|---|
| 380 sq ft | Studio / 1-bed, max cash-on-cash | $75,240–$117,040 |
| 500 sq ft | 1–2 bed, most popular | $99,000–$154,000 |
| 620 sq ft | 2–3 bed / multigen, max value | $122,760–$190,960 |
Dial in your own number with the ADU cost calculator.
Estimate your ADU
Ballpark 2026 turnkey cost, financing, and rental return for your area.
Estimated turnkey cost
$198–$308 / sq ft · incl. design, permits & construction
Estimates only — 2026 regional ranges, not a bid. Your real price depends on site conditions, finishes, and your lot. We confirm with a free feasibility check.
Garage Conversion projects in Folsom
Folsom feasibility starts with the topo: Empire Ranch and American River Canyon lots often need a grading and retaining plan before a slab can be set. South of Highway 50, the Folsom Ranch HOA review gets added on top of the city's. Every garage conversion is fixed-price, funded on inspection-passed milestones, and backed by our written guarantee.
Browse finished builds and specs in our ADU project gallery.
Garage Conversion ADU in Folsom — FAQs
A garage conversion adu in Folsom typically runs $75,240–$190,960 turnkey in 2026, based on $198–$308 per square foot for the Sacramento County market. We confirm your exact number with a free feasibility check.
Folsom garage conversion adu permits are handled by the City of Folsom Community Development Department. Folsom's Community Development Department applies 4 ft side/rear setbacks and a 16 ft height cap, but the city's hillside and master-planned (Folsom Ranch) lots often add grading, retaining, or fire-zone requirements we scope up front. HOA review is common south of Highway 50. We prepare and submit the full package and manage inspections.
A garage conversion adu in Folsom rents for about $1,900–$3,000 a month in 2026 depending on size and finish. Folsom's job base and schools keep rents and resale values at the top of Sacramento County, so even higher site-work costs pencil out on appraised-value lift and premium rent.
Yes. Sacramento allows garage conversions to ADUs and does not require you to replace the lost parking. A conversion that stays within the existing garage footprint generally needs no additional setbacks, which keeps cost and approval time down.
Garage conversions typically run $95,000–$250,000 in the Sacramento region, depending on size, condition of the existing structure, and whether you expand the footprint. It's the lowest cost-per-square-foot path to a legal ADU.
Garage Conversion ADU near Folsom
ADU services in Folsom
Upside models for Garage Conversion
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Not sure which type fits your lot? See all ADU services in Folsom or compare every build type on our ADU services hub.
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