ADU learning center · Sacramento
Sacramento ADU guides
This is the Upside ADU learning center: seven plain-English guides that answer the questions Sacramento homeowners ask before they build — what an ADU costs, the 2026 rules and permits, how to finance it, property-tax impact, the latest California law, ADU versus addition, and rental ROI. Each guide owns one topic in depth, updated for 2026.
Start here
Where to begin
Most people arrive with one question. Here's the fastest route to the guide that answers it — and the right order if you're researching the whole project.
Most-read
The guides people open first
The four questions that decide most ADU projects: cost, rules, financing, and ROI. If you read nothing else, read these.
1 guide
Basics
New to ADUs? Start here. What an accessory dwelling unit is, the types, the terms, and how California's statewide rules work — the foundation before cost, permits, and financing.
3 guides
Cost
What an ADU actually costs in Sacramento in 2026 — market-wide ranges, cost-per-square-foot, and what moves the number. Read these before you talk price with any builder.
6 guides
Rules & Permits
How many units you can build, setbacks, height, parking, owner-occupancy, and the 2026 state law changes that override your city. The rules side of feasibility.
2 guides
Financing
How Sacramento homeowners pay for an ADU — HELOC, cash-out refi, renovation and construction loans — plus the dated truth on the CalHFA grant most sites still get wrong.
7 guides
ROI & Value
Whether the math works: rents by submarket, payback periods, property-tax impact, and how an ADU stacks up against a plain home addition.
Past the research
When you're ready to price a real build
These guides cover the market-wide picture. When you want Upside's actual numbers and next steps, here's where each thread continues.
Our published prices
Most builders hide pricing. We publish all-in ranges by type, what's included, and the $1,000-down, inspection-milestone schedule.
Estimate your lot
Pick a type, a city, and a size to get an all-in cost and a rough rental ROI for your specific project in a couple of minutes.
The five build types
Detached, garage conversion, attached, junior (JADU), and multigenerational — what each one is, who it suits, and how we build it.
How we write these guides
Every guide is written and reviewed by the Upside ADU build team — Sacramento-region ADU specialists who pull permits and run these numbers on real projects. We use dated 2026 figures, flag when a rule varies by jurisdiction, and correct the things competitors leave stale (the CalHFA grant is exhausted; owner-occupancy rules changed). This is general education, not legal or tax advice — we confirm the exact rules for your address during a free feasibility check.
About these guides
Seven areas: ADU cost, rules and setbacks, financing, property tax, 2026 California law, ADU-versus-addition, and rental income and ROI. Each guide owns one topic in depth and is updated for 2026, so you can research the whole project end to end without piecing it together from a dozen sites.
Both, by design. Cost, rules, ROI, and the ADU-versus-addition comparison are written for the Sacramento region and its counties. Financing, property tax, and the 2026 law guide are statewide California topics that apply anywhere in the state, including Sacramento.
Each guide carries a visible last-updated date and is reviewed against current California and Sacramento ADU rules. ADU law changes most legislative sessions, so we re-check figures and statutes regularly and confirm the rules for your exact jurisdiction during a free feasibility check.
These guides are neutral education, not a price list. For Upside's published prices and the $1,000-down, inspection-milestone payment schedule, see the pricing page. To estimate your specific build, use the cost calculator. The cost guide here links to both.
Done reading? Get the numbers for your lot.
Send us your address and goal — we'll tell you what's buildable, what it costs, and which type pays back fastest, usually within a few days.