MEP Plans in Fortuna, CA
Permit-ready mechanical, electrical and plumbing plans for ADUs, garage conversions, additions and single-family homes in Fortuna, prepared for plan check at the City of Fortuna building department, with Title 24 available in the same order.
Fortuna project facts we design around
| County | Humboldt County |
|---|---|
| Title 24 climate zone | Climate Zone 1, confirmed by ZIP for every project |
| Electric utility (most addresses) | Pacific Gas and Electric (PG&E) |
| Permit review | The City of Fortuna building department |
| ADU permits issued, 2021–2025 | 17 (#365 of 450 cities) |
| ADU approval timeline | Approve or deny within 60 days of a complete application (state law) |
ADU building activity in Fortuna
Fortuna issued 17 ADU building permits from 2021 through 2025, the 365th most among the 450 California cities that reported ADU permits. Permits went from 4 in 2021 to 1 in 2025.
| 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| 4 | not reported | 4 | 8 | 1 |
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 Fortuna
The California Energy Commission's design-day data for Fortuna gives the outdoor conditions a Manual J load calculation uses: a summer design temperature of 68°F and a winter design temperature of 30°F.
| Summer design (1%) | 68°F dry bulb / 59°F wet bulb |
|---|---|
| Winter design (median of extremes) | 30°F |
| Daily temperature range | 11°F |
| Elevation | 100 ft |
| Heating degree days | 2,000 |
Loads are small in this mild climate, so the common mistake is oversizing. A right-sized heat pump runs longer, quieter cycles and controls humidity better than a rule-of-thumb unit.
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.
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 |
|---|---|---|---|
| Eureka | CZ 1 | Pacific Gas and Electric (PG&E) | 166 |
| Arcata | CZ 1 | Pacific Gas and Electric (PG&E) | 74 |
| McKinleyville (unincorp.) | CZ 1 | Pacific Gas and Electric (PG&E) | 40 |
| Ferndale | CZ 1 | Pacific Gas and Electric (PG&E) | 13 |
| Blue Lake | CZ 1 | Pacific Gas and Electric (PG&E) | 6 |
| Rio Dell | CZ 1 | Pacific Gas and Electric (PG&E) | 5 |
Guides for Fortuna projects
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Start My OrderGeneral guidance, not legal advice. Climate zone and utility are shown for most addresses in Fortuna; requirements vary by project. Confirm with the City of Fortuna building department.