Kensington ADU Cost & Builders — 2026
Detached Kensington ADU builds run $220K–$550K all-in ($418–$605/sq ft) once permits, SDC, utility hookups, and finishes are stacked. Compare costs, zoning, rental income, and pull 3 verified quotes below.
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Kensington ADU Costs by Build Type
Pricing is derived from the San Diego city average adjusted for Kensington's premium cost tier (1.10× baseline).
| Build type | 2026 cost range | Notes |
|---|---|---|
| Detached new build | $220K–$550K | Stand-alone backyard unit, 600–1,000 sq ft |
| Attached addition | $187K–$468K | Bumped off existing structure |
| Garage conversion | $99K–$248K | Existing shell reused |
| Basement / interior | $121K–$303K | Where lot type permits |
Kensington ADU Rental Income (2026)
Average rents tracked from San Diego MLS, Zillow, and local rental data. ADUs typically command a 5–15% premium over comparable units due to newer construction.
| Unit type | Monthly rent | Annual gross |
|---|---|---|
| 1 bedroom | $2,000–$2,500 | $24K–$30K/yr |
| 2 bedroom | $2,600–$3,200 | $31K–$38K/yr |
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Kensington Zoning, HOA & Historic Notes
- Community plan / overlay
- Kensington Heights Historic District
- Permit considerations
- Talmadge / Kensington Community Plan. Many lots have canyon-edge setback constraints; geotech often required.
- HOA situation
- Kensington Heights Historic District — Historical Resources Board review for contributing structures.
- Historic district
- Portions of Kensington fall within a historic district. Contributing structures require design review and material/massing approval. Plan an extra 4–10 weeks of permitting time and engage a designer familiar with the local landmark commission.
Always pull a property profile on your specific lot before designing — setbacks, height limits, and FAR can change parcel-by-parcel inside Kensington.
Kensington ADU FAQs
How much does an ADU cost in Kensington, San Diego?
Kensington ADUs typically run $220K–$550K all-in for a 600–1,000 sq ft detached unit in 2026. Costs trend above the San Diego city average due to higher land values and finish expectations. Per square foot pricing is typically $380–$550.
Are there special permits or overlays for ADUs in Kensington?
Talmadge / Kensington Community Plan. Many lots have canyon-edge setback constraints; geotech often required. Always pull a property profile before designing — Kensington's Kensington Heights Historic District can change setback and height requirements lot-by-lot.
What can I rent a Kensington ADU for?
As of 2026, Kensington commands roughly $2,000–$2,500 for a 1-bedroom ADU and $2,600–$3,200 for a 2-bedroom. Rents lean higher with off-street parking, in-unit laundry, and walkability to transit or commercial corridors.
Are HOAs or historic districts an obstacle in Kensington?
Kensington Heights Historic District — Historical Resources Board review for contributing structures. Historic district overlays in this neighborhood add design review — budget an extra 4–10 weeks and plan for material/massing constraints on contributing structures.
How do I get a quote from a verified Kensington ADU builder?
Submit your lot details using the quote form on this page. We'll match you with up to 3 Kensington-area builders who have completed projects within 5 miles. There's no cost or obligation, and quotes typically arrive within 48 hours.
Related San Diego ADU Resources
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