Watts-Hillandale, in north-central Durham north of Duke's East Campus, is a neighborhood of mostly early- and mid-twentieth-century houses on wooded streets, including bungalows, revival-style homes and cottages. Unlike nearby Trinity Park, it is one of Durham's eight locally designated historic districts, along with Cleveland Street, Downtown Durham, Fayetteville Street, Golden Belt, Holloway Street, Morehead Hill and Trinity Heights. Each district has a preservation plan, and in each one, a Certificate of Appropriateness (COA) is required for exterior changes.
What needs a COA
Durham's rules are broad. Any property in a local historic district, regardless of its age or significance, is subject to the COA process, and a COA is required whether or not the change is visible from the street. The city lists examples that may need one:
- building additions;
- replacing siding, doors or windows;
- above-ground utilities;
- landscaping, lighting and paving;
- walls and fences.
Routine maintenance done according to preservation practice, such as repainting a previously painted surface or replacing small amounts of material with no change in appearance, design or material, doesn't need a COA. Ask staff if you're unsure; the city publishes a classification-of-work chart.
Minor vs. major COAs
| Minor COA | Major COA | |
|---|---|---|
| Typical work | Small modifications, landscaping and site work, rear decks, items that won't significantly alter the original character | Changes that may affect the original character, new structures, additions, demolition of significant structures |
| Who decides | Planning & Development staff | Historic Preservation Commission (HPC), in a quasi-judicial hearing |
| Timing | Accepted any weekday; staff typically process a complete application within 10 business days | HPC meets the first Tuesday of each month; the application deadline is set about two months before the meeting |
| Extra steps | — | Required pre-submittal conference with staff; mailed notice to neighbors and a sign on the property |
For the 2026 calendar, the city's published schedule shows, for example, a September 28 application deadline for the December 1 meeting, and a November 2 deadline for the January 5, 2027 meeting. Staff comments must be resolved before the hearing is scheduled.
An approved COA is valid for two years, or as long as an associated building permit is active. An HPC decision can be appealed by filing a petition in Durham Superior Court within 30 days.
The cost of skipping it
Durham is direct about this: starting work without a COA can delay permits and lead to a Notice of Violation, and because local historic properties are subject to zoning rules, owners can face a daily fine of $500 for each day of non-compliance after receiving the notice. If work has already started, the city asks owners to contact preservation staff right away.
Planning common projects
- Additions. Major COA territory. Plan for the pre-submittal conference and a two-month-plus runway to the hearing. Designs that stay subordinate to the original house and use compatible materials fare best. See home additions.
- Windows. Replacement is a listed COA item. Restoration with storm windows is usually simpler to approve and keeps original fabric. See windows.
- Porches and rear decks. Rear decks can fall under minor COAs. Front porch changes are more sensitive. See porches and decks.
- Roofs. Replacing in kind may count as maintenance; changing materials is a COA question. See roofing.
- Paint. Repainting previously painted surfaces is maintenance. Lead-safe practices are required for paid work on pre-1978 houses. See exterior painting.
- Interiors and systems. Kitchens, baths and HVAC don't need a COA unless they change the exterior or site, for example a new condenser pad, vent or window. They do need Building & Safety permits. See kitchen remodeling, bathroom remodeling and HVAC.
Questions to settle with your designer before applying
- Which items in the project are maintenance, which are minor and which are major? Splitting a project can sometimes move the simple parts forward sooner.
- Which features of the house are original, and which are later changes? Documentation, such as old photos, permit records and the district's preservation plan, helps staff and the commission.
- Will the work touch trees, walls, walks or grading? Site work is part of review in Durham's districts.
- Does the schedule allow for the pre-submittal conference, the staff comment period and the hearing?
Building permits
After the COA, Durham's City-County Building & Safety handles plan review and permits. Residential plans go through Dplans, and trade permits and inspection scheduling run through LDO. A building permit is required for load-bearing work or projects over $40,000 in market value.
Rebates and licensing
Duke Energy customers can use Smart $aver rebates for qualifying HVAC, insulation and air sealing; check current terms. North Carolina requires a licensed general contractor for jobs of $40,000 or more. Verify on the NCLBGC license search.
Services we match in Watts-Hillandale
- Window Replacement — Replacement windows and historic window repair.
- Porches, Decks & Sunrooms — Screened porches, three-season rooms and decks.
- Home Additions — Primary suites, bedrooms, bonus rooms and sunrooms.
- Roofing — Roof replacement, storm and tree damage, ventilation.
- Exterior Painting — Siding and trim repaints with rot repair.
- Kitchen Remodeling — Open layouts, islands and updated finishes.
- Bathroom Remodeling — Primary baths, showers and accessible updates.
- HVAC — Heat pumps, dual-fuel systems and ductwork.
Watts-Hillandale homeowner questions
Do I need a COA for work in my backyard?
Yes. In Durham's local historic districts, a COA is required whether or not the change is visible from the street. Rear decks and site work are often minor COAs.
How long is a Durham COA good for?
Two years, or as long as an associated building permit stays active.
What happens if I start without a COA?
You may face permit delays and a Notice of Violation, followed by a daily fine of $500 for each day of non-compliance after the notice.
Is repainting my house a COA item?
Repainting a previously painted surface is treated as maintenance and doesn't need a COA.
Nearby areas
Durham · Trinity Park · Chapel Hill
Guides for Watts-Hillandale homeowners
Sources
Checked by the Raleigh Home Projects editorial team on October 20, 2026. Rules and prices change, so confirm details with the agency or your contractor before you sign.