MEP Plans in Keyes, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Keyes (unincorporated Stanislaus County), prepared for plan check at Stanislaus County Planning & Community Development – Building Permit Services, with Title 24 available in the same order.
Keyes project facts we design around
| County | Stanislaus County (unincorporated) |
|---|---|
| Title 24 climate zone | Climate Zone 12, confirmed by ZIP for every project |
| Electric utility (most addresses) | Turlock Irrigation District (TID) |
| Permits issued by | Stanislaus County Planning & Community Development – Building Permit Services |
| ADU permits issued, 2021–2025 | 25 |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Keyes
Stanislaus County issued 25 ADU building permits from 2021 through 2025 for addresses in Keyes, based on the county's reports to the state. Permits went from 2 in 2022 to 11 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| not reported | 2 | 3 | 9 | 11 |
Source: California Department of Housing and Community Development, Annual Progress Report data (ADU building permits by year).
Title 24 in Climate Zone 12
- 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 0.613) / 1000 + 1.4; no PV is required if that is under 1.8 kWdc, which for a single ADU works out to about 653 sq ft or smaller.
Climate Zone 12 requirements in full →
HVAC design for Keyes
The HVAC is sized from a room-by-room Manual J using the outdoor design conditions for the address, in Climate Zone 12's Central Valley-style climate — hot summers, cool winters. Heat pump sized for cooling and verified for winter heating.
Electrical service from Turlock Irrigation District (TID)
If the load calculation shows you need a service upgrade, a second meter or a relocated service, Turlock Irrigation District (TID) handles that through its Application for New Service, separately from the building permit.
ADU electrical service with Turlock Irrigation District (TID) →
Plumbing and sewer
The plumbing plan shows the route, slope and cleanouts of the connection to the existing sewer lateral or septic system.
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 |
|---|---|---|---|
| Modesto | CZ 12 | Modesto Irrigation District (MID) | 527 |
| Ceres | CZ 12 | Turlock Irrigation District (TID) | 42 |
| Turlock | CZ 12 | Turlock Irrigation District (TID) | 26 |
| Waterford | CZ 12 | Modesto Irrigation District (MID) | 23 |
| Salida (unincorp.) | CZ 12 | Modesto Irrigation District (MID) | 23 |
| Newman | CZ 12 | Pacific Gas and Electric (PG&E) | 21 |
Stanislaus County → · All California cities and communities →
Guides for Keyes projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Keyes; requirements vary by project. Confirm with Stanislaus County Planning & Community Development – Building Permit Services.