MEP Plans in Susanville, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Susanville, prepared for plan check at the City of Susanville building department, with Title 24 available in the same order.
Susanville project facts we design around
| County | Lassen County |
|---|---|
| Title 24 climate zone | Climate Zone 16, confirmed by ZIP for every project |
| Electric utility (most addresses) | Lassen Municipal Utility District |
| Permit review | The City of Susanville building department |
| ADU permits issued, 2021–2025 | 8 (#406 of 450 cities) |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Susanville
Susanville issued 8 ADU building permits from 2021 through 2025, the 406th most among the 450 California cities that reported ADU permits. Permits went from 4 in 2023 to 4 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| not reported | not reported | 4 | not reported | 4 |
Source: California Department of Housing and Community Development, Annual Progress Report data (ADU building permits by year).
Title 24 in Climate Zone 16
- 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 0.59) / 1000 + 1.22; no PV is required if that is under 1.8 kWdc, which for a single ADU works out to about 983 sq ft or smaller.
Climate Zone 16 requirements in full →
HVAC design for Susanville
The California Energy Commission's design-day data for Susanville gives the outdoor conditions a Manual J load calculation uses: a summer design temperature of 94°F and a winter design temperature of -1°F.
| Summer design (1%) | 94°F dry bulb / 61°F wet bulb |
|---|---|
| Winter design (median of extremes) | -1°F |
| Daily temperature range | 38°F |
| Elevation | 4,148 ft |
| Heating degree days | 6,233 |
Heating governs here. Choose a cold-climate heat pump that keeps its rated capacity near -1°F, and protect water lines and the water heater from freezing.
Electrical service from Lassen Municipal Utility District
If the load calculation shows you need a service upgrade, a second meter or a relocated service, open that request with Lassen Municipal Utility District early; utility lead times are often longer than plan check.
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 |
|---|---|---|---|
| Janesville (unincorp.) | CZ 16 | Lassen Municipal Utility District | 5 |
| South Lake Tahoe | CZ 16 | Liberty Utilities | 37 |
| Truckee | CZ 16 | Truckee Donner Public Utility District | 117 |
| Big Bear Lake | CZ 16 | Bear Valley Electric Service | 23 |
| Mammoth Lakes | CZ 16 | Southern California Edison (SCE) | 22 |
Guides for Susanville projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Susanville; requirements vary by project. Confirm with the City of Susanville building department.