Crawl Space Encapsulation in Durham, NC

Durham works differently from Raleigh and Cary: a single office, Durham City-County Building & Safety, handles permits, plan review and inspections for both the City and the County of Durham. Here's what its published pages say that matters for closing (encapsulating) a crawl space.

Front of a two-story brick house with a green lawn, shrubs and a driveway

Which permits Durham lists

The department's permit list includes:

Building permit: required for any project that includes load-bearing work, or any project over $40,000 in market value
Electrical permit: for installing, repairing or altering electrical wiring or equipment (minor fixture replacements in one- and two-family homes excluded)
Mechanical permit: for installing or upgrading heating, air conditioning and ventilation systems
Multi-Trade permit: combines several trades into one permit for coordinated projects

The state fire marshal's office (OSFM) treats any closed crawl space conversion as permit work whatever the job costs, since each code-approved drying option involves HVAC or electrical equipment. Ask Building & Safety which of Durham's permits your job needs.

Applying: Small Project Review through Dplans

Work on an existing one- or two-family home, such as renovations and repairs, goes through Durham's Small Project Review:

Applications are submitted electronically through the Dplans portal, along with the checklist for the type of project. Renovation and repair work uses the Renovations checklist.
An application fee is charged once the application is accepted, and it must be paid before review begins. Reviews happen in the order received.
A lot partly in a floodplain or a Local Historic overlay, or a designated Historic Landmark, needs extra review disciplines that may not follow Small Project Review time frames.
An issued permit that isn't picked up within six months is voided.

Durham's pages don't publish a typical review time for small projects. Under state law (G.S. 160D-1110), when a local government reviews residential plans, the initial review must be done within 15 business days of submission.

What the Renovations checklist asks for

Durham's Renovations checklist (revised April 2026) asks applicants to confirm that the plans show:

Crawl space access (18 × 24 inches), or a closed crawl space under NC Residential Code Section 409
Construction drawings for any structural alterations, or a detailed written scope of work for cosmetic changes

For projects costing $40,000 or more, the checklist also requires a general contractor license from the NC Licensing Board for General Contractors (or a notarized Owner Exemption Affidavit), a lien agent form, and proof of workers' compensation or liability insurance. Applications without a designated contractor may be rejected.

Inspections in Durham

Durham's residential inspections checklist lists "Closed crawl spaces 409" among foundation items and "Closed crawl 409" at final.
Contractors use the LDO (Land Development Office) system to schedule inspections, check plan or permit status and pay fees online.
A "Who's my inspector today?" page covers building inspectors.
If you disagree with an inspection decision, Durham offers an informal internal review form.

Contact Durham Building & Safety

City-County Building & Safety, 101 City Hall Plaza, Durham, NC 27701. Phone 919-560-4144, Monday–Friday 8 a.m.–5 p.m. (This is Durham's government office, not ours.)

Keep reading

Raleigh Crawl Space Guide is an independent informational and referral site about crawl spaces in Raleigh, Cary and Durham, NC. It does not perform crawl space work and is not a contractor. It's general information, not professional advice. Confirm code and permit requirements with your local inspections office.

Sources: Durham City-County Building & Safety · Durham Small Project Review · Durham Renovations Checklist (Rev. 04.09.2026) · Durham Residential Inspections Checklist (02.20.2026) · Durham Inspection Requirements · N.C.G.S. 160D-1110 · NC OSFM interpretation 106.1

Last reviewed: 2026-10-27