Home Remodeling Costs in Castro Valley, CA
Remodeling costs in Castro Valley run about 49% above the California median, based on home values and labor rates across its 2 ZIP codes in Alameda County. The ranges below reflect what Castro Valley homeowners actually pay, from the cheapest to the priciest part of town.
- Cost index
- 1.49×
- California median
- Median home value
- $1,222,600
- Zillow ZHVI
- ZIP codes
- 2
- Alameda County
- Projects covered
- 10
- cost + ROI data
What Remodeling Projects Cost in Castro Valley (2026)
Ranges span Castro Valley's least to most expensive ZIPs, including the ±15% contractor variance. ROI is the share of cost typically recouped at resale in your census region.
Cost range
$14,467 - $19,838
Typical
$17,135
Cost range
$22,191 - $30,429
Typical
$26,284
Cost range
$33,966 - $46,575
Typical
$40,230
Cost range
$30,947 - $42,435
Typical
$36,654
Cost range
$5,661 - $7,762
Typical
$6,705
Cost range
$22,160 - $30,386
Typical
$26,246
Cost range
$72,335 - $99,187
Typical
$85,675
Cost range
$22,262 - $30,526
Typical
$26,367
Cost range
$2,963 - $4,062
Typical
$3,509
Cost range
$12,580 - $17,250
Typical
$14,900
| Project | Cost range | Typical | ROI | Details |
|---|---|---|---|---|
| Roofing Replacement | $14,467 - $19,838 | $17,135 | 76/100 | ZIP estimate → |
| Window Replacement | $22,191 - $30,429 | $26,284 | 85/100 | ZIP estimate → |
| Kitchen Remodel | $33,966 - $46,575 | $40,230 | 100/100 | ZIP estimate → |
| Bathroom Remodel | $30,947 - $42,435 | $36,654 | 91/100 | ZIP estimate → |
| Garage Door Replacement | $5,661 - $7,762 | $6,705 | 100/100 | ZIP estimate → |
| Deck Addition | $22,160 - $30,386 | $26,246 | 100/100 | ZIP estimate → |
| Basement Finishing | $72,335 - $99,187 | $85,675 | 71/100 | ZIP estimate → |
| Siding Replacement | $22,262 - $30,526 | $26,367 | 100/100 | ZIP estimate → |
| Entry Door Replacement | $2,963 - $4,062 | $3,509 | 100/100 | ZIP estimate → |
| HVAC Replacement | $12,580 - $17,250 | $14,900 | 77/100 | ZIP estimate → |
Sources: Remodeling Magazine Cost vs. Value, Zillow ZHVI, BLS construction wages. Data updated 2026-05. How we calculate estimates
Roofing Replacement Cost by ZIP Code
Pick a project and the prices below update. Costs vary up to 1% across Castro Valley. Open your ZIP for the full local breakdown.