Skip to content

Norwalk · Building on your lot

Building in a flood zone in Norwalk

Norwalk's own rules on building in a flood zone, with the code text for every value.

Ask about building in a flood zone in Norwalk See coverage

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

What Norwalk's code says

Norwalk code What Norwalk's code adds
Floodplain permit
  • A development permit is needed for all construction or development, including placing a manufactured home.
    Applies: So the city can tell whether the site is in a special flood hazard area.
    § 15.48.080 · code text
    A development permit shall be obtained for all proposed construction or other development, including the placement of manufactured homes, so that it may be determined whether such construction or other development is within a special flood hazard area.
Building in a floodway
  • No encroachment unless engineering analyses show it would not raise flood levels at all.
    Applies: Within the adopted regulatory floodway.
    § 15.48.110 · code text
    Encroachments, including, but not limited to, fill, new construction, substantial improvements, and other development, are prohibited within the adopted regulatory floodway unless it has been demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering practices that the proposed encroachment would not result in any increase in flood levels within the community during the occurrence of the base flood discharge.
Height of the lowest floor
  • At or above the base flood level.
    Applies: Lowest floor, including basement, of new or substantially improved homes.
    § 15.48.110 · code text
    The lowest floor (including the basement) of all new construction and substantial improvements of residential structures shall be elevated to or above the base flood level.

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

What are the rules for building in a Norwalk flood zone?

Norwalk's code: A development permit is needed for all construction or development, including placing a manufactured home. (So the city can tell whether the site is in a special flood hazard area.) (§ 15.48.080); At or above the base flood level. (Lowest floor, including basement, of new or substantially improved homes.) (§ 15.48.110).

General information, not legal advice.

Ask about a specific Norwalk property

Ask GoCodebook how Norwalk's building in a flood zone rules apply to your situation and get an answer that cites the section.

Ask your question

More on building on your lot in Norwalk

All building on your lot rules in Norwalk

Fences and walls in Norwalk

Sheds, garages and other accessory structures in Norwalk

Swimming pools in Norwalk

Garage and yard sales in Norwalk

Parking spaces required for homes in Norwalk

Home alarm permits and false alarms in Norwalk

Signs on homes in Norwalk

Norwalk Municipal Code — full text