ADU & Home Additions in Mountain View
Add living space or rental income to your Mountain View property — designed to complement your home's architecture, from Eichler to Craftsman.
How Much Does ADU & Home Additions Cost in Mountain View?
Garage conversions and JADUs on the lower end. Custom detached 1,200 sq ft ADUs with premium finishes at the higher end.
Every project is unique. We provide a fixed-price contract after your free consultation — no hidden fees, no cost-plus surprises. The price you agree to is the price you pay.
What to Know About ADU & Home Additions in Mountain View
Local building codes, neighborhood character, and permit requirements vary by city. Here's what Mountain View homeowners should know before starting a project.
- 01Mountain View allows detached ADUs up to 1,200 sq ft and has eliminated parking requirements for properties near transit — which includes most of the city given Caltrain and VTA access
- 02The City of Mountain View ADU permit process typically takes 6-8 weeks for custom designs, with pre-application consultations available at the Building Division counter
- 03Mountain View Eichler neighborhoods have specific roofline and setback character — designing an ADU with a low-slope roof and horizontal lines helps it integrate with the existing Eichler streetscape
- 04Mountain View charges impact fees for ADUs over 750 sq ft, typically $8,000-$18,000 depending on unit size and location — we include these in our fixed-price contracts
- 05Many Mountain View lots in Monta Loma, Rex Manor, and Waverly Park are 6,000-8,000 sq ft — enough for a well-designed detached ADU with a small private yard
Our ADU & Home Additions Process
A clear, structured approach from your first call to final reveal.
Feasibility Assessment
We evaluate your property, zoning, and lot coverage to determine what's possible and what will deliver the best ROI.
Design & Engineering
Our architects create plans that maximize space, light, and livability while meeting all local building codes.
Permits & Approvals
We navigate the full permitting process — city planning, building department, and utility coordination.
Construction
Our experienced crew builds your ADU with the same quality standards as our luxury home remodels.
Inspection & Handover
We manage all inspections, obtain the certificate of occupancy, and walk you through your completed ADU.
ADU & Home Additions in Mountain View: FAQ
Answers to common questions from Mountain View homeowners.
Absolutely, and we strongly recommend it. We design Eichler-compatible ADUs with low-slope roofs, exposed beam details, clerestory windows, and materials that complement your home's mid-century character. The result is an ADU that looks like it was always part of the property rather than an afterthought.
A typical Mountain View ADU takes 5-8 months from permit submission to completion. Permitting takes 6-8 weeks, and construction runs 4-6 months depending on size and complexity. Garage conversions are faster — typically 3-4 months of construction time.
Mountain View ADU rents are among the highest in the Bay Area due to proximity to Google, LinkedIn, and other tech employers. A one-bedroom ADU typically rents for $2,800-$3,200/month, while a two-bedroom unit commands $3,400-$3,800+. These rents can cover a significant portion of your mortgage.
No. Mountain View does not require owner-occupancy for properties with ADUs. You can rent both units, live in either unit, or use the ADU for family. This flexibility makes ADUs an excellent investment whether you live on the property or not.
Mountain View's zoning generally allows two-story construction, but adding a second story to an Eichler fundamentally changes the home's architectural character and requires significant structural engineering for the slab foundation. We typically recommend room additions or detached ADUs for Eichler properties to preserve the single-story aesthetic.
Detached ADUs in Mountain View require 4-foot setbacks from side and rear property lines. The ADU must also be at least 6 feet from the primary dwelling. For lots with specific constraints, we can design efficient floor plans that maximize living space within these requirements.
More Services in Mountain View
Explore our other design-build services available in Mountain View.
Ready to Start Your Mountain View ADU & Home Additions?
Book a free in-home consultation. We'll discuss your vision, walk through your space, and provide a detailed fixed-price estimate — no pressure, no obligation.