Portola Valley

The maximum area or percent of any parcel of land that may be occupied by impervious surfaces is specified in Tables 1 and 2 of Section 18.48.010.

When conditional use permits are approved for the uses listed below... may allow impervious surfaces in excess of those specified in Section 18.56.010 when it finds there is no reasonable way to meet the normal impervious surface standards...

In other than residential zoning districts, planting in required front yards shall conform with any roadside planting standards adopted by the conservation committee. At least twenty-five percent of such required front yard shall be landscaped, such area to have a minimum dimension of five feet.

Landscaping shall be located in close proximity to structures in order to improve appearance, obscure unattractive features, or effect visual separation from parking lots.

Landscaping in such districts shall present an overall unified appearance. To this end, landscape design and planting for contiguous properties shall be coordinated, especially where planting beds adjoin.

Parcels with frontage on the following roads if planted with trees and/or shrubs, shall be planted with only such trees and shrubs as are on a plan approved by the conservation committee. This provision shall apply to the portion of the parcel within seventy-five feet of the road right-of-way.

Parcels in C-C and A-P districts shall have a minimum percent of the parcel as specified below with a natural vegetative cover or in a landscaped condition. ... C-C (community commercial) district thirty percent

Parcels in C-C and A-P districts shall have a minimum percent of the parcel as specified below with a natural vegetative cover or in a landscaped condition. ... A-P (administrative-professional) district forty percent

No structure shall be closer than two hundred feet to the right-of-way of Skyline Boulevard, provided, however, that the architectural and site control commission may allow a reduction of the setback to no less than one hundred feet when it finds that in such a location the proposed structure will not be visible from the right-of-way of Skyline Boulevard.

No structure shall be located closer than seventy-five feet to the right-of-way of Alpine Road in that section of Alpine Road lying between the northerly town limits and Portola Road.

No structure shall be located closer to the right-of-way of Portola Road in that section from the intersection with Alpine Road to the northwesterly town limits than as stipulated below: a. In zoning districts requiring a minimum parcel area of one acre or larger, no structure shall be closer to the Portola Road right-of-way than fifty feet; ... b. In zoning districts requiring a minimum parcel area less than one acre, a one-story house shall observe a minimum setback of thirty-five feet and any second story addition thereto shall observe a minimum setback of forty-five feet; alternatively, a two-story house shall observe a minimum setback of forty feet.

Where the location of the trace is 'known', the boundary of the zone is set back from the trace fifty feet from the center line of the trace. Where the location of the trace is 'inferred', the boundary of the zone is set back one hundred feet from the center line of the trace. Where the trace is characterized as an 'en-echelon' trace, the boundary of the zone is set back one hundred feet from the center line of the trace.

Construction of new buildings for human occupancy within one hundred feet of such mapped fault traces shall be supported by a site-specific geologic investigation that demonstrates to the satisfaction of the town geologist that the structure is not underlain by the suspected fault.

In residential districts, required parking facilities, except required guest parking spaces, shall be in a carport or garage and all spaces shall be located on the same parcel or building site

In R-1/7.5M, 15M and 20M zoning districts, where the ASCC finds there is no reasonable location for a second required covered parking space...

Supportive housing and Transitional housing | None

Every parking area in an R, R-MF, or M-U district shall be governed by the following provisions...

Architectural and site plan review shall be required in connection with matters listed in this section; ...

Any parcel in an A-P district may be occupied by a principal use listed in Section 18.22.020 or, when authorized by the planning commission, by a conditional use listed in Section 18.22.030 together with uses accessory to such principal use of conditional use as are specified in Section 18.22.050.

Various definitions with numeric constraints: JADU max 500 sq ft, basement ceiling height max 12 ft, basement floor joist height max 18 inches above grade, basement floor area not exceed first floor, basement story threshold 4 ft, attic exemption <7 ft height, private road area subtracted from lot size.