ADU cost in Mira Mesa, San Diego (2026 permit data)
How much does an ADU cost in Mira Mesa?
Single-ADU permits near Mira Mesa declared a median $171,200 of construction in 2026 (middle half $83,800–$200,600, 42 permits), 42% above the City of San Diego median of $120,900. Declared value excludes design, City fees and utility work.
51 City building permits near Mira Mesa added at least one ADU between January 1 and October 15, 2026. Of these, 11 were conversions and 18 new detached units, so Mira Mesa leans toward new detached builds.
Planning range for a premium build: start from the $200,600 upper quartile and add design, engineering, utility connections and finishes.
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Mira Mesa ADU permits by type
| Type | Permits | Low (25%) | Median | High (75%) |
|---|---|---|---|---|
| All single-ADU permits | 42 | $83,800 | $171,200 | $200,600 |
| Conversions (garage/room) | 11 | $64,100 | $78,600 | $193,500 |
| New detached ADUs | 18 | $185,800 | $198,700 | $210,500 |
| City of San Diego, all areas | 750 | $76,000 | $120,900 | $197,700 |
Valuation is the construction value declared to the City, not a quote. Download the area data.
Permit timeline in Mira Mesa
The median ADU permit near Mira Mesa took 217 days from application to issue, versus 298 days citywide. Correction rounds are usually the longest part. Full timeline · Step-by-step permit guide.
How an ADU project runs
- Feasibility (1–3 weeks): lot, setbacks, sewer lateral, panel capacity.
- Design and engineering (1–3 months).
- City plan check and corrections (217 days median here, application to issue).
- Construction: conversions are generally shorter than new detached builds.
- Final inspection, utilities, occupancy. A panel upgrade often follows; see what comes next.
Questions San Diego homeowners ask
What is the typical ADU budget in Mira Mesa?
Single-ADU permits near Mira Mesa declared a median $171,200 of construction in 2026 (middle half $83,800–$200,600, 42 permits), 42% above the City of San Diego median of $120,900. Declared value excludes design, City fees and utility work.
Is a garage conversion cheaper than a detached ADU in Mira Mesa?
Near Mira Mesa, conversions declared a median $78,600 (11 permits) and new detached ADUs $198,700 (18 permits). See the full comparison.
How long does an ADU permit take in Mira Mesa?
The 2026 median near Mira Mesa was 217 days from application to issue (298 days citywide).
Are City impact fees charged on ADUs?
Development Impact Fees are waived for ADUs under 750 sq ft and for the first two ADUs on a property (SDMC §142.0640). School, plan check and permit fees still apply.
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