Published 2026 data for whole-home remodels in San Diego runs roughly $150–$450 per square foot for construction, depending on scope. Additions come in higher because they include foundation, framing, roof, and MEP for square footage that did not exist before. Second-story additions come in highest because they require structural reinforcement of the existing building underneath.
What does a renovation or addition cost in San Diego in 2026?
| Project type | 2026 cost band | Notes |
|---|---|---|
| Cosmetic refresh | $60–$110 / sf | Paint, flooring, fixtures; no structural or layout change |
| Kitchen remodel (mid-range) | $50,000–$100,000 | New cabinets, counters, plumbing, tile |
| Bathroom remodel (mid-range) | $30,000–$65,000 | Master bath; guest baths typically less |
| Mid-range whole-home remodel | $130–$220 / sf | Full kitchen/bath, layout tweaks, partial MEP |
| Major renovation (gut) | $250–$400 / sf | New everything, layout changes, engineering |
| First-story addition | $250–$400 / sf | New foundation, roof, MEP for added area |
| Master suite addition | $120,000–$250,000+ | Bedroom, bath, closet, some structural |
| Second-story addition | $300,000–$600,000+ · $400–$600 / sf | Reinforce existing building + build on top |
Line items nobody quotes upfront
- Title 24 energy compliance on additions and alterations — new windows at U-0.30, high-efficacy lighting, R-13 + R-8 continuous wall insulation, Quality Insulation Installation requirements.
- Structural engineering when load-bearing walls come out — typically $20,000–$50,000 by itself for an LVL or steel beam and new footings.
- Soils reports on hillside or expansive-soil lots — $2,500–$5,000, and required by DSD IB-140 before permit for foundations on fill or expansive soil.
- City fees beyond plan check — $1,000–$5,000+ for a full home remodel, plus General Plan Maintenance and Lead Hazard Prevention line items.
- Very High Fire Hazard Severity Zone construction — CRC R337 exterior materials, ember-resistant vents, Class A roofing per SDMC 55.9401.
- Coastal Development Permit in the coastal zone — typically 15–25% construction premium on top of the CDP process itself.
The real timeline, not the marketing timeline
The City of San Diego's published average processing time for residential permits is roughly 176 days. Cosmetic remodels can permit in same-day to two weeks. Mid-range remodels run one to three months of permit review plus 8–16 weeks of construction. Major renovations with engineering run three to six months of review plus 16–40 weeks of construction. First-story additions typically run four to six months of review plus 20–30 weeks of construction. Second-story additions run five to eight months of review plus 30–52 weeks of construction. Most custom additions go through three or four plan-check cycles at 3–6 weeks each.
We do not permit on the first submittal. Nobody does. What we do is a road map for permitting so correction cycles are short. Nalu Architecture Inc. is the architect, not the builder.
Related: ADU permit reality check, coastal permit summary, and residential services.
Questions we hear
What does a home renovation cost per square foot in San Diego in 2026?
Cosmetic remodels run $60–$110 per square foot. Mid-range whole-home remodels run $130–$220 per square foot. Major gut renovations with layout and structural changes run $250–$400 per square foot. Luxury and architect-designed projects run $400–$650+ per square foot. First-story additions run $250–$400 per square foot. Second-story additions run $400–$600 per square foot because they require reinforcing the existing building.
How long does a residential addition take to permit in San Diego?
The City of San Diego's published average processing time for residential permits is roughly 176 days. Cosmetic remodels can permit same-day to two weeks. Mid-range remodels take one to three months. Major renovations with engineering typically take three to six months. First-story additions take four to six months. Second-story additions take five to eight months. Most custom additions go through three or four plan-check cycles.
When does a remodel need a permit in San Diego?
Any structural, electrical, or plumbing change requires a City of San Diego building permit. Additions and alterations to single-family dwellings and duplexes are covered by DSD Information Bulletin 140, which also requires Title 24 energy compliance, structural details, and Stormwater Requirements Applicability Checklist DS-560 with every submittal. Paint and flooring-only work typically does not require a permit.
NALU® is a registered trademark of Nalu Architecture, Inc. Architectural services are provided through Chris Schumm, AIA, California Registered Architect, License No. C-36569. This page is general planning information for 2026, not an opinion on a specific site. Every engagement is scoped and contracted individually.