MEP Plans in Smith River, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Smith River (unincorporated Del Norte County), prepared for plan check at Del Norte County Community Development Department – Building Inspection Division, with Title 24 available in the same order.
Smith River project facts we design around
| County | Del Norte County (unincorporated) |
|---|---|
| Title 24 climate zone | Climate Zone 1, confirmed by ZIP for every project |
| Electric utility (most addresses) | Pacific Power (PacifiCorp) |
| Permits issued by | Del Norte County Community Development Department – Building Inspection Division |
| ADU permits issued, 2021–2025 | 16 |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Smith River
Del Norte County issued 16 ADU building permits from 2021 through 2025 for addresses in Smith River, based on the county's reports to the state. Permits went from 2 in 2021 to 4 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| 2 | 2 | 5 | 3 | 4 |
Source: California Department of Housing and Community Development, Annual Progress Report data (ADU building permits by year).
Title 24 in Climate Zone 1
- Windows: U-factor 0.27 or lower (no SHGC limit in this zone), with total window area up to 20% of floor area.
- Solar PV sized by the CEC formula kW = (floor area x 0.793) / 1000 + 1.27; no PV is required if that is under 1.8 kWdc, which for a single ADU works out to about 668 sq ft or smaller.
Climate Zone 1 requirements in full →
HVAC design for Smith River
The HVAC is sized from a room-by-room Manual J using the outdoor design conditions for the address, in Climate Zone 1's coastal, marine-influenced climate. Right-size the heat pump from a real Manual J instead of a tonnage guess.
Electrical service from Pacific Power (PacifiCorp)
If the load calculation shows you need a service upgrade, a second meter or a relocated service, Pacific Power (PacifiCorp) handles that through its Builder Service Request, separately from the building permit.
ADU electrical service with Pacific Power (PacifiCorp) →
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 |
|---|---|---|---|
| Crescent City | CZ 1 | Pacific Power (PacifiCorp) | 35 |
| Long Beach | CZ 6, 8 | Southern California Edison (SCE) | 3,015 |
| Torrance | CZ 6, 8 | Southern California Edison (SCE) | 1,051 |
| Santa Monica | CZ 6 | Southern California Edison (SCE) | 620 |
| Huntington Beach | CZ 6 | Southern California Edison (SCE) | 437 |
Del Norte County → · All California cities and communities →
Guides for Smith River projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Smith River; requirements vary by project. Confirm with Del Norte County Community Development Department – Building Inspection Division.