A: A foundation certification indicates that a registered civil engineer has inspected and certified that the foundation system of a manufactured home meets with the criteria of the HUD Permanent Foundations Guide for Manufactured Housing, dated September, 1996.

Q: What Does It Mean When It Says?
  • Engineer's Certification

  • Certificate of Compliance

  • Engineer's Report


A: They all refer to the request for a civil engineer to certify that the foundation system of a mobile or manufactured home meets with the HUD Permanent Foundations Guide for Manufactured Housing, dated September 1996.

Q: What If I Am Not In Compliance?


A: If the home does not initially meet with certain HUD/FHA guidelines, we may be able to provide resources or references to assist in bringing the home into compliance and then ultimately produce the necessary certification.

Q: What Are Your Service Areas?


A: De Leon Engineering provides mobile and manufactured home certifications in Northern California in the following Counties:



  • Lake

  • Mendocino

  • Napa

  • Sonoma


We may be able to assist with references in more distant counties or provide services in those areas at an additional cost. Please contact our firm for a quote.

  • Solano

  • Colusa

  • Glenn

  • Yolo

Q: I have a 433(A) document; why isn't that enough?


A: The 433 does not address compliance with guidelines issued by FHA/HUD as may be required by the mortgage lender. 


When a manufactured home is installed on a foundation system, the local building department will issue a permit for the homes installation and perform periodic inspections of the installation process. Upon a satisfactory final inspection, the building department will record a document  referred to as HCD FORM 433(A), which includes a Certificate of Occupancy. This document provides NOTICE OF MANUFACTURED HOME, MOBILE HOME OR COMMERCIAL MODULAR-INSTALLATION ON A FOUNDATION SYSTEM, and references the homeowner, property address, local agency, issuing permit, permit number, unit description and date of manufacture, assessor’s parcel number, and date of recordation.


All of this information applies only to compliance with local building agency for the county in which the home is installed. 

Q: Why is the lender requiring this?


A: The Lender is the true owner of a home with a mortgage until that mortgage is paid off. For that reason, the Lender needs to ensure that what they are loaning on is structurally sound, safe, and compliant with State and Federal standards and local building codes. This compliance not only minimizes the risk on the lender's investment, but also protects the health and safety of the occupant(s) of the home.



© 2018 De Leon Engineering

PO BOX 940 - Lakeport, California  95453  -  (707) 263-6111