Before You Build in Mountain View, CA: Permit & Rule Checklist (2026)
Everything you need to know before starting a home improvement project
Building a fence, installing a pool, or adding a shed? Each project has its own set of local permits and rules in Mountain View. This guide consolidates fence, pool, ADU, shed, fire pit, and landscaping regulations into one checklist so you know what to expect before you start.
Quick Permit Checklist
At-a-glance overview of permit categories in Mountain View. Click any card for details.
Fences & Walls
5 rules on file
Swimming Pools
5 rules on file
ADUs & Granny Flats
2 rules on file
Sheds & Outbuildings
3 rules on file
Fire Pits & Outdoor Structures
2 rules on file
Landscaping & Tree Removal
3 rules on file
Fences & Walls
Heavy RestrictionsHeight limits, materials, permits, and shared fence rules.
Neighbor Fence Rules
Some RestrictionsShared fences between Mountain View neighbors are governed by California Civil Code 841 which presumes equal cost sharing for maintenance with 30 day written notice required before work.
Pool Barriers
Heavy RestrictionsMountain View enforces California Health and Safety Code 115920 et seq. requiring at least two pool safety features including compliant 60 inch barriers with self-closing self-latching gates.
Retaining Walls
Some RestrictionsRetaining walls over 4 feet in height (measured from bottom of footing) require a building permit and engineering in Mountain View, with additional scrutiny for walls supporting surcharge loads.
Permit Requirements
Some RestrictionsMountain View does not require a building permit for standard residential fences up to 6 feet, but retaining walls, taller fences, and corner lot fences may require permits or planning review.
Height Limits
Some RestrictionsFences in Mountain View are limited to 3 feet in front yards and 6 feet in side and rear yards; anything taller requires a fence exception or design review approval.
Swimming Pools
Heavy RestrictionsPool permits, safety fencing, and drainage requirements.
Safety Rules
Heavy RestrictionsMountain View pools must meet California Swimming Pool Safety Act requirements including anti-entrapment drain covers, barriers, and at least one of seven approved safety features.
Fencing Requirements
Heavy RestrictionsMountain View requires pool barriers at least 60 inches high with self-closing, self-latching gates to comply with the California Swimming Pool Safety Act (H&S 115920).
Pool Permits
Some RestrictionsMountain View requires building, plumbing, and electrical permits to construct or install any in-ground or above-ground swimming pool deeper than 18 inches under the California Building Code.
Above-Ground Pools
Some RestrictionsAbove-ground pools in Mountain View deeper than 18 inches require permits and must meet the same fencing and safety rules as in-ground pools under California H&S 115920.
Hot Tub Rules
Some RestrictionsHot tubs and spas in Mountain View require electrical and building permits, and those without locking safety covers must meet the same fencing requirements as pools.
ADUs & Granny Flats
Some RestrictionsAccessory dwelling unit rules and garage conversion permits.
ADU Rules
Few RestrictionsMountain View ADU regulations follow California Government Code 65852.2 as amended by AB 68, AB 881, SB 13, and AB 1033. Ministerial approval applies to most ADUs and JADUs on single-family lots.
Garage Conversions
Some RestrictionsConverting a garage to living space or ADU in Mountain View is allowed with permits. State ADU law waives replacement parking when the garage is converted to an ADU.
Sheds & Outbuildings
Some RestrictionsShed permits, setback limits, and outbuilding size rules.
Shed Rules
Few RestrictionsSheds under 120 square feet do not require a building permit in Mountain View but must meet zoning setbacks and height limits. Larger sheds need a permit.
Carport Rules
Some RestrictionsCarports in Mountain View require a building permit and must meet zoning setbacks. Front-yard carports are generally restricted to preserve neighborhood character.
Tiny Homes
Some RestrictionsTiny homes on foundations are regulated as ADUs in Mountain View. Movable tiny houses on wheels may be allowed as ADUs if they meet state movable tiny house standards.
Fire Pits & Outdoor Structures
Heavy RestrictionsFire pit placement, outdoor burning restrictions, and permits.
Outdoor Burning
Heavy RestrictionsOpen outdoor burning of leaves, yard waste, or debris is prohibited in Mountain View. Only contained recreational fires using approved fuel are allowed.
Fire Pit Rules
Some RestrictionsMountain View allows portable outdoor fire pits fueled by natural gas or propane. Open wood burning is generally prohibited on Spare the Air days declared by BAAQMD.
Landscaping & Tree Removal
Heavy RestrictionsTree removal permits, heritage tree protections, and water rules.
Tree Trimming
Heavy RestrictionsMountain View regulates pruning of heritage and street trees. Work on protected trees requires a permit and must follow ISA pruning standards.
Water Restrictions
Heavy RestrictionsMountain View enforces permanent water waste rules and follows state mandates. Outdoor watering is limited and runoff, hosing down pavement, and leaks are prohibited.
Tree Removal & Heritage Trees
Heavy RestrictionsRemoving a Heritage Tree in Mountain View requires a permit, a finding of justification, and replacement plantings. Unpermitted removal carries significant penalties.
General Permit Tips
When do you typically need a permit?
Most cities require permits for structural work, including fences over a certain height, pools, ADUs, and sheds above a size threshold. Even projects that seem minor can trigger permit requirements, so it is always best to check first.
How to apply for a building permit
Visit your local building department or their website. Most jurisdictions accept online applications. You will typically need a site plan, project description, and may need contractor information. Processing times vary from same-day for simple projects to several weeks for larger builds.
Common permit violations to avoid
Building without a permit, exceeding approved dimensions, and ignoring setback requirements are the most common violations. Penalties can include fines, required removal of the structure, and complications when selling your home.
Permit Guides for Nearby Cities
Looking for rules beyond permits? View all ordinances we track for Mountain View.