Free Estimator Tool
Get a ballpark estimate for your ADU project in Monterey, Santa Cruz, or San Benito County. Adjust the options below — then reach out for a free on-site consultation and exact quote.
1 — ADU type
2 — Size & finish
3 — Include in estimate
Solar & battery backup
Required on new construction in CA since 2020
Permit & design fees
Architectural drawings & county permits
Site prep & utilities
Grading, trenching, electrical & plumbing hookups
Entrance & landscaping
Private walkway, lighting, basic privacy plantings
Your estimate
$180,000 – $240,000
600 sq ft detached · standard finish
Cost per sq ft
$300 – $400
Typical timeline
6 – 9 months
Est. rental income
$1,800 – $2,400/mo
Approx. payoff
7 – 11 years
These are general estimates based on current material and labor costs in Monterey and surrounding counties. Final pricing depends on your site, design choices, and permit requirements. Contact Aldridge Construction for a free on-site consultation.
Get a Free On-Site Estimate Or call Brian directly: (831) 682-9788