Rules
Part of Preservation contractors: nineteen trades and how to find them
Contractor licensing for preservation work: who is on the hook
Which credentials preservation contractors actually need, who pulls the permit, how liability follows the permit holder, and what certified work means.
What to take away
- There is no national preservation contractor license. Licensing is by state and by trade, and it varies widely.
- The permit holder carries responsibility. If you pull the permit yourself to save a fee, you have taken on the liability.
- Certified rehabilitation is a federal program term with a specific regulatory meaning, not a contractor credential.
- Confirm every credential with the issuing body rather than with the person holding it.
Preservation work sits under ordinary construction regulation, with an extra layer of design review where a district exists. Knowing which rules apply to whom prevents a lot of confusion, and it settles in advance the question of who answers to the inspector.
What is licensed and what is not
Trade licensing generally covers electrical, plumbing, mechanical and, in many states, general contracting. Craft skills like plastering, sash restoration and historic masonry are usually not separately licensed at all. That means a highly skilled sash restorer may hold no license, and a licensed general contractor may know nothing about sash.
Licensed trades vs. unlicensed craft
Licensed
- Electrical
- Yes
- Plumbing
- Yes
- Mechanical
- Yes
- General contracting
- Many states
- Plastering
- —
- Sash restoration
- —
- Historic masonry
- —
Not separately licensed
- Electrical
- —
- Plumbing
- —
- Mechanical
- —
- General contracting
- —
- Plastering
- Usually no
- Sash restoration
- Usually no
- Historic masonry
- Usually no
Licensing is issued by states, and sometimes by cities and counties, so the names change from place to place. California licenses contractors through the Contractors State License Board, which issues a B General Building classification along with trade classifications such as C-10 Electrical, C-36 Plumbing and C-20 HVAC, and runs a free public license lookup. New York State does not license general contractors at all; in New York City the requirement is a Home Improvement Contractor license from the Department of Consumer and Worker Protection.
Separate that question from certification for hazardous work. Firms paid to disturb paint in pre-1978 housing must be certified under the EPA's Renovation, Repair and Painting Rule, which certifies the firm and requires trained people on the crew — the federal lead-safe rules. Ask for that certificate and for the individual training records.
Asbestos abatement is licensed in every state. California issues a C-22 Asbestos Abatement contractor classification and requires employers doing the work to register with Cal/OSHA; the federal work-practice standard is the asbestos NESHAP, 40 CFR Part 61, Subpart M. Get the license from the firm that will actually do the removal, not from the general contractor.
Windows are the worst case for lead dust in a house, which is why window work carries its own set of questions for the building department.
Who pulls the permit
| Who pulls it | Consequence |
|---|---|
| The contractor | They are responsible for compliance and inspections |
| The owner as owner-builder | You carry the responsibility, and often the liability |
| A subcontractor for their trade | Responsibility is split by scope |
Contractors sometimes ask an owner to pull the permit because the contractor is not licensed in that jurisdiction. Treat that request as information, not as a favor.
Who pulls the permit
Who pulls it
- Contractor
- Responsible for compliance
- Owner as owner-builder
- You carry responsibility
- Subcontractor
- Responsibility split
Consequence
- Contractor
- and inspections
- Owner as owner-builder
- and often liability
- Subcontractor
- by scope
The question also matters at resale. Unpermitted work surfaces in a title search or an appraisal, and correcting it retroactively costs far more than the permit would have, particularly where an inspection now requires opening finished work. Keep the permit file with the rest of the paperwork for that reason, since the closeout documents are what a buyer actually sees.
What certified actually means
Owners hear the phrase certified historic rehabilitation and assume it describes a contractor. It does not. It is a determination made about a project under a federal program, with criteria in regulation.
The program is the federal historic rehabilitation tax credit, and the criteria applied to a project are the Secretary of the Interior's Standards for Rehabilitation. The rules are published in full: the Park Service posts the program regulations at 36 CFR Part 67, which define certified historic structure, certified rehabilitation and the review procedure.
The wider legal framework is worth a glance too. The Park Service maintains a reference list of federal historic preservation laws, regulations and orders, which runs from the National Historic Preservation Act to the Secretary of the Interior's Standards. Section 106 review is required by that Act and governed by its own rules at 36 CFR Part 800, and it applies to federal undertakings — federally funded, permitted or licensed projects — rather than to a private owner spending private money.
The document set to collect before work starts
- State or local contractor license, verified with the issuing board.
- Certificate of general liability insurance, sent by the insurer or agent.
- Workers compensation coverage, or a state-issued exemption.
- EPA Renovation, Repair and Painting firm certification for pre-1978 housing.
- Asbestos abatement license, held by the abatement firm itself.
- Written confirmation of who is pulling each permit.
Ask for all six at once, at the bidding stage. It is a reasonable request and it filters efficiently.
The map of which trade to hire is in the nineteen preservation specialties, and permit sequencing on a specific project is a conversation with your local building department.
