MEP Plans in South Lake Tahoe, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in South Lake Tahoe, prepared for plan check at the City of South Lake Tahoe building department, with Title 24 available in the same order.
South Lake Tahoe project facts we design around
| County | El Dorado County |
|---|---|
| Title 24 climate zone | Climate Zone 16, confirmed by ZIP for every project |
| Electric utility (most addresses) | Liberty Utilities |
| Permit review | The City of South Lake Tahoe building department |
| ADU permits issued, 2021–2025 | 37 (#323 of 450 cities) |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in South Lake Tahoe
South Lake Tahoe issued 37 ADU building permits from 2021 through 2025, the 323rd most among the 450 California cities that reported ADU permits. Permits went from 1 in 2021 to 10 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| 1 | 6 | 9 | 11 | 10 |
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 South Lake Tahoe
The California Energy Commission's design-day data for South Lake Tahoe gives the outdoor conditions a Manual J load calculation uses: a summer design temperature of 79°F and a winter design temperature of -2°F.
| Summer design (1%) | 79°F dry bulb / 55°F wet bulb |
|---|---|
| Winter design (median of extremes) | -2°F |
| Daily temperature range | 33°F |
| Elevation | 6,200 ft |
Heating governs here. Choose a cold-climate heat pump that keeps its rated capacity near -2°F, and protect water lines and the water heater from freezing.
Electrical service from Liberty Utilities
If the load calculation shows you need a service upgrade, a second meter or a relocated service, Liberty Utilities handles that through its New Construction Service Application (PowerClerk portal), separately from the building permit.
ADU electrical service with Liberty Utilities →
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 |
|---|---|---|---|
| Placerville | CZ 12 | Pacific Gas and Electric (PG&E) | 72 |
| Shingle Springs (unincorp.) | CZ 12 | Pacific Gas and Electric (PG&E) | 62 |
| El Dorado Hills (unincorp.) | CZ 12 | Pacific Gas and Electric (PG&E) | 51 |
| Cameron Park (unincorp.) | CZ 12 | Pacific Gas and Electric (PG&E) | 17 |
| Camino (unincorp.) | CZ 12 | Pacific Gas and Electric (PG&E) | 17 |
| Diamond Springs (unincorp.) | CZ 12 | Pacific Gas and Electric (PG&E) | 9 |
El Dorado County → · All California cities and communities →
Guides for South Lake Tahoe projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in South Lake Tahoe; requirements vary by project. Confirm with the City of South Lake Tahoe building department.