What it is
This permit is designed for companies that transport manufactured homes or modular units across Washington State. Because these structures often exceed legal size limits, a permit is required for lawful movement.
The annual version eliminates the need to apply for repeated single-trip permits.
What it allows
With an annual manufactured housing permit, you can:
- Make multiple moves of manufactured homes during the year
- Transport units within specific size limits:
- Up to 14 ft box width (approx. 15 ft overall with eaves)
- Up to 15 ft height
- Up to 75 ft total length
- Operate legally without reapplying for each shipment
Who needs it
This permit is typically required for:
- Manufactured home dealers
- Transport companies moving homes
- Manufacturers delivering units to installation sites
It’s not for general freight carriers—only for housing unit transport operations.
Cost
Typical Washington permit pricing:
- Annual Permit: $860
Why it matters
Manufactured homes are:
- Oversized loads that exceed standard legal limits
- Transported from factories to final installation sites
- Required to comply with strict state safety and routing regulations
This permit helps businesses:
- Save time (no repeated applications)
- Reduce operational delays
- Stay compliant with WSDOT regulations
Key limitations
- Only valid for manufactured housing transport
- Must stay within specified size limits
- May still require:
- Route restrictions
- Pilot/escort vehicles (depending on size/load)
- Not valid for unrelated oversize loads