MEP Plans in Redwood Valley, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Redwood Valley (unincorporated Mendocino County), prepared for plan check at Mendocino County Planning and Building Services – Building Division, with Title 24 available in the same order.
Redwood Valley project facts we design around
| County | Mendocino County (unincorporated) |
|---|---|
| Title 24 climate zone | Climate Zone 2, confirmed by ZIP for every project |
| Electric utility (most addresses) | Pacific Gas and Electric (PG&E) |
| Permits issued by | Mendocino County Planning and Building Services – Building Division |
| ADU permits issued, 2021–2025 | 12 |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Redwood Valley
Mendocino County issued 12 ADU building permits from 2021 through 2025 for addresses in Redwood Valley, based on the county's reports to the state. Permits went from 1 in 2021 to 4 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| 1 | 1 | 1 | 5 | 4 |
Source: California Department of Housing and Community Development, Annual Progress Report data (ADU building permits by year).
Title 24 in Climate Zone 2
- 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%).
- Solar PV sized by the CEC formula kW = (floor area x 0.621) / 1000 + 1.22; no PV is required if that is under 1.8 kWdc, which for a single ADU works out to about 934 sq ft or smaller.
Climate Zone 2 requirements in full →
HVAC design for Redwood Valley
The HVAC is sized from a room-by-room Manual J using the outdoor design conditions for the address, in Climate Zone 2's North Coast inland climate — warm dry summers, cool winters. Heat pump sized for both heating and cooling seasons.
Electrical service from Pacific Gas and Electric (PG&E)
If the load calculation shows you need a service upgrade, a second meter or a relocated service, Pacific Gas and Electric (PG&E) handles that through its Your Projects portal, separately from the building permit.
ADU electrical service with Pacific Gas and Electric (PG&E) →
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 |
|---|---|---|---|
| Ukiah | CZ 2 | City of Ukiah Electric Utility | 41 |
| Fort Bragg | CZ 1 | Pacific Gas and Electric (PG&E) | 41 |
| Mendocino (unincorp.) | CZ 1 | Pacific Gas and Electric (PG&E) | 23 |
| Willits | CZ 2 | Pacific Gas and Electric (PG&E) | 15 |
| Hopland (unincorp.) | CZ 2 | Pacific Gas and Electric (PG&E) | 10 |
| Boonville (unincorp.) | CZ 2 | Pacific Gas and Electric (PG&E) | 6 |
Mendocino County → · All California cities and communities →
Guides for Redwood Valley projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Redwood Valley; requirements vary by project. Confirm with Mendocino County Planning and Building Services – Building Division.