MEP Plans in Roseville, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Roseville, prepared for plan check at the City of Roseville building department, with Title 24 available in the same order.
Roseville project facts we design around
| County | Placer County |
|---|---|
| Title 24 climate zone | Climate Zone 11, confirmed by ZIP for every project |
| Electric utility (most addresses) | Roseville Electric Utility |
| Permit review | The City of Roseville building department |
| ADU permits issued, 2021–2025 | 128 (#187 of 450 cities) |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Roseville
Roseville issued 128 ADU building permits from 2021 through 2025, the 187th most among the 450 California cities that reported ADU permits. Permits went from 19 in 2021 to 39 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| 19 | 26 | 24 | 20 | 39 |
Source: California Department of Housing and Community Development, Annual Progress Report data (ADU building permits by year).
Title 24 in Climate Zone 11
- Windows: U-factor 0.27 or lower and solar heat gain coefficient (SHGC) 0.23 or lower, with total window area up to 20% of floor area (west-facing up to 5%).
- Whole-house fan required (at least 1.5 cfm per square foot of floor area); units of 500 sq ft or less are exempt.
- Cool roof required: steep-sloped roofs need aged solar reflectance 0.2 or higher and thermal emittance 0.75 or higher.
- Solar PV sized by the CEC formula kW = (floor area x 0.836) / 1000 + 1.44; no PV is required if that is under 1.8 kWdc, which for a single ADU works out to about 431 sq ft or smaller.
Climate Zone 11 requirements in full →
HVAC design for Roseville
The California Energy Commission's design-day data for Roseville gives the outdoor conditions a Manual J load calculation uses: a summer design temperature of 100°F and a winter design temperature of 24°F.
| Summer design (1%) | 100°F dry bulb / 70°F wet bulb |
|---|---|
| Winter design (median of extremes) | 24°F |
| Daily temperature range | 36°F |
| Elevation | 160 ft |
Cooling governs equipment size here. At 100°F design conditions, west-facing glass, attic insulation and duct location move the load more than anything else, and the heat pump's electrical load has to be carried into the panel calculation.
Electrical service from Roseville Electric Utility
If the load calculation shows you need a service upgrade, a second meter or a relocated service, Roseville Electric Utility handles that through its New and Upgraded Electric Service process, separately from the building permit.
ADU electrical service with Roseville Electric Utility →
Plumbing and sewer
The plumbing plan shows the route, slope and cleanouts of the connection to the existing sewer lateral.
Pricing is flat statewide: ADU plans from $995, full ADU MEP package from $2,295, Title 24 add-on $240. See what's in a complete ADU MEP set.
Nearby places compared
| Place | Climate zone | Electric utility | ADU permits 2021–25 |
|---|---|---|---|
| Granite Bay (unincorp.) | CZ 11 | Pacific Gas and Electric (PG&E) | 131 |
| Auburn | CZ 11 | Pacific Gas and Electric (PG&E) | 105 |
| Rocklin | CZ 11 | Pacific Gas and Electric (PG&E) | 76 |
| Lincoln | CZ 11 | Pacific Gas and Electric (PG&E) | 46 |
| Loomis | CZ 11 | Pacific Gas and Electric (PG&E) | 46 |
| Newcastle (unincorp.) | CZ 11 | Pacific Gas and Electric (PG&E) | 33 |
Guides for Roseville projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Roseville; requirements vary by project. Confirm with the City of Roseville building department.