Building in a flood zone in Mountain House: the local rules

Each rule below links to the section of the Mountain House Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Mountain House's code says

Mountain House code What Mountain House's code adds
Floodplain permit	A Floodplain Encroachment Permit to alter a watercourse; a Use Permit to change a floodway's location. Applies: Within any special flood hazard area, before construction or development begins. § 9-16-205 · code text Within any area of special flood hazard, the following permits shall, where indicated, be obtained prior to the commencement of any construction or development:
Height of the lowest floor	At least 1 foot above the 100-year flood elevation. Applies: Lowest floor, including basement, of new or substantially improved structures, including homes, in special flood hazard areas. § 9-16-212 · code text All new construction and substantial improvements of any structure in areas of special flood hazard shall have the lowest floor, including basement, elevated to at least one (1) foot above the one hundred (100) year flood elevation. At least 1 foot higher than the FIRM depth number in feet, measured from the highest adjacent grade. Applies: New or substantially improved structures, including homes, in FIRM Zone A or AO with a depth number. § 9-16-212 · code text All new construction and substantial improvement of any structure in FIRM Zone A or AO shall have the lowest floor, including the basement, elevated at least one (1) foot higher than the depth number specified in feet on the FIRM measured from the highest adjacent grade At least 2 feet above the highest adjacent grade. Applies: New or substantially improved structures, including homes, in FIRM Zone A or AO with no depth number. § 9-16-212 · code text or at least two (2) feet if no depth number is specified.

Who this affects

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Frequently asked questions

What are the rules for building in a Mountain House flood zone?

Mountain House's code: A Floodplain Encroachment Permit to alter a watercourse; a Use Permit to change a floodway's location. (Within any special flood hazard area, before construction or development begins.) (§ 9-16-205); At least 1 foot above the 100-year flood elevation. (Lowest floor, including basement, of new or substantially improved structures, including homes, in special flood hazard areas.) (§ 9-16-212).

Building in a flood zone in Mountain House

What Mountain House's code says

Who this affects

Frequently asked questions

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