Milpitas has established single-family neighborhoods west of I-680 and hillside areas to the east. Two-story tract homes often have room for a Junior ADU in an attached garage or ground-floor wing, while larger lots can take a detached ADU. Hillside properties can involve additional grading and geologic review, and some newer neighborhoods add HOA approval to the process. We work with the City of Milpitas so your project is designed to be approved.
Every project includes a fixed construction price and one project manager.
We handle every permit. Here's the short version of what Milpitas typically requires for common projects:
Detached, attached and garage ADUs for rental income or extended family.
Turn an existing garage into a legal ADU, in-law suite or home office.
Add a private suite of up to 500 sq ft inside the home you already own.
From refreshes to estate kitchens, typically $60K to $250K+.
Walk-in showers, primary suites and accessible bathrooms.
Bedrooms, primary suites and guest houses that match your home.
Whole-house renovations planned from 4–5 months to 12+ months.
One team for design, city approvals and construction.
2026 ranges for planning purposes. Your fixed price follows a site visit.
It depends on your lot and budget. A Junior ADU inside the home is usually fastest and least expensive, a garage conversion creates a separate unit, and a detached ADU offers the most privacy. We compare options during a site visit.
Most JADUs cost about $55,000–$95,000 when converting a bedroom with a shared bath, and up to about $190,000 with a private bath or an attached-garage conversion.
If your home is in an HOA community, exterior changes and ADUs may need HOA architectural approval. California limits how far HOAs can restrict ADUs, but their approval process still applies.
Construction for a single-room addition typically takes 3–4 months, and a primary suite addition 4–6 months, plus time up front for design, engineering and permits.
Most Milpitas kitchen remodels fall into three levels: about $60,000–$95,000 for a refresh, $95,000–$150,000 for a signature remodel with semi-custom cabinetry and layout changes, and $150,000–$250,000 or more for an estate-level custom kitchen, plus city permit fees.
Plans and permits typically take 8–14 weeks, and construction of a detached ADU usually takes 16–22 weeks once permits are issued, so most detached ADUs are finished in about 6–9 months. Garage conversions and JADUs are usually faster.
Planning a project in Milpitas? Tell us about your property and choose your project type. We’ll review your ideas and follow up within one business day to schedule a free consultation.
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