ADU Design Mountain View
Develop the floor plan, exterior direction, material selections, functionality, and site fit before committing to engineering and construction.
Santa Clara County · California
Mountain View ADU design & construction.
Create more space for family and new possibilities for your property. Start with an ADU plan shaped around your Mountain View lot.
Property reviews are preliminary. Final feasibility, setbacks, utilities, costs and timing require current agency information and review by the appropriate licensed professionals.
Local planning guide · Reviewed October 2, 2026
What matters for an ADU in Mountain View
Permitting authority: City of Mountain View — ADUs
Official local guidanceLocal rules and design checks
| Topic | Local guidance |
|---|---|
| Early review | The City encourages preliminary design discussion with Planning before detailed building plans. |
| Site package | Provide the City-preapproved building set together with the required property-specific documents. |
| Public improvements | Determine whether utility construction in the public right-of-way needs an excavation permit. |
Selected local requirements, not a complete zoning determination. Confirm the current rules for your address with the responsible agency.
Fees and budget checks
The City gives a typical preapproved permit range of $7,000–$13,000 for stated construction valuations of $100,000–$300,000, plus an excavation-permit fee of up to $12,000 where applicable. These are City examples, not a quote; prescreen establishes the project’s assessed fees.
Mountain View preapproved ADU fee examplesHow to start the permit process
Discuss the concept with Planning, prepare the permit submission and follow the prescreen payment instructions based on the actual scope.
Municipal application example
Mountain View’s preapproved application resource
The City’s program explains the site package and provides fee examples tied to construction valuation and utility work. It helps compare a standard design with a custom proposal.
View the original sourceMountain View ADU questions
- Does the permit estimate include excavation in the street?
- The City describes a potentially separate excavation-permit fee depending on utility improvements and right-of-way work.
- When will the City tell me the assessed fee?
- Mountain View says staff provide the amount and payment instructions during prescreen.
Sources for this guide
- City of Mountain View — ADUs
- Mountain View preapproved ADU fee examples
- Mountain View Building fee schedule
Local sources reviewed October 2, 2026. Historical examples retain their stated dates. Contact ADU California Inc. to confirm project availability; this guide does not establish an office location or property approval.
Design-led ADU planning
ADU design, architecture & engineering coordination in Mountain View
Start with ADU design in Mountain View, then coordinate architect and engineer scope, permitting, budgeting, and the custom builder or contractor work needed to move the project toward construction.
ADU Architect Mountain View
Architectural planning can address layout, massing, code constraints, site relationships, and permit drawings where an appropriately licensed professional is required.
ADU Engineer Mountain View
Engineering coordination can cover structural, foundation, utility, civil, energy, and other disciplines required by the property and permitting authority.
Custom ADU Builder Mountain View
Compare custom scope, site constraints, model options, finish level, construction sequence, and written pricing before selecting a build approach.
ADU Contractor Mountain View
Coordinate construction scope, subcontractors, schedule, inspections, site logistics, and closeout around a clearly defined permitted set.
ADU Design Build Mountain View
A coordinated design-build workflow keeps property review, design, engineering, permitting, budgeting, procurement, and construction aligned.
A useful first review
Separate what is available from what still needs verification.
01
Confirm the property
Start with a complete address and review the available parcel, building, and map context.
02
Identify the unknowns
Keep missing setbacks, easements, utilities, access, hazards, and local requirements visible.
03
Choose the next review
Use the preliminary result to prepare a focused conversation with the required professionals and agencies.
Explore project types
Compare the scope before choosing a solution.
These pages explain the questions each project type introduces. They do not assert that a particular scope is permitted or suitable for your address.
Compare planning footprints
See common ADU sizes before choosing a design.
These model pages are planning references only. They are not a statement that a particular size is allowed or buildable at a Mountain View address.
California directory
Explore more city guides.
The next useful action
Put your address at the center of the conversation.
The online review is preliminary and is not a permit decision, survey, engineering opinion, construction document, final price, or guaranteed schedule.