Drywall and plaster repair before painting: cost, permits and old-house cautions

Updated November 10, 2026 · KeystoneProGuide editorial team

How much does wall repair add to a paint job?

For drywall, Angi reports a national average repair cost of $613, with most homeowners paying $296 to $930, based on 36,945 projects. Some contractors, it says, charge $50 to $75 per square foot of repair or $60 to $90 an hour, and jobs run from $10 to $30 for a do-it-yourself kit on a small hole up to $1,300 for a large ceiling repair. Angi's interior painting guide budgets an average of $600 for drywall repair on a paint job, and $0.50 to $0.75 per square foot for routine sanding and patching.

Plaster is a different scale. Angi's plaster guide gives a national average of $3,840 and a typical range of $2,000 to $7,200, which reflects larger jobs; it prices individual repairs much lower, at around $22 for a hole and $30 for a crack by type of damage, rising to about $100 for water damage and $120 for mold. Neither survey publishes a Pennsylvania figure.

Why does the repair matter so much to the paint?

Because paint shows every flaw under it, and because damaged walls often mean a cause that paint cannot fix. NC State Extension's maintenance checklist asks homeowners to look at ceilings and walls for cracks, loose or failing plaster, signs of leaks and stains. A crack that reopens, or a stain that bleeds through new paint, usually means the movement or the water is still there. Ask the painter what caused the damage before agreeing on how to cover it.

Do repairs need a permit?

Ordinary ones do not. Pennsylvania's building code regulation says an ordinary repair does not require a permit, and it lists what does not count as one: cutting away a load-bearing wall, removing or cutting a structural beam or load-bearing support, and removing or changing a required means of egress. Patching drywall or plaster is well short of that.

In Philadelphia, the city also says that, outside the historic register, gypsum wallboard installed over existing wall surfaces in one- or two-family homes often needs no building permit. A repair that opens a wall to fix wiring or pipes may bring other trades and their own permits into the job.

How does the lead rule treat wall repairs?

More strictly than many people expect, in a house built before 1978. The federal rule's small-job exception covers six square feet or less of disturbed paint per room, but the EPA's frequent questions narrow it for repairs:

• Making a hole with a hammer is demolition. The EPA's example is a hole about two feet on each side. Although it disturbs less than six square feet, knocking it out with a hammer is demolition of a painted surface, so the exception does not apply. Cutting the section out without destroying it is not demolition.
• Drilled holes add up. For holes drilled in a painted wall, the exception is based on the combined area of the holes.
• Time adds up. The six square feet includes all work in the room over any 30-day period.

So a painter who cuts out and replaces a damaged section of wall in an older house may well be doing covered work. The Pennsylvania Department of Health's advice for any renovation in such a house is to keep the work wet: wet scraping and wet sanding, never dry.

Could the wall contain asbestos?

In an older house, yes. The EPA lists textured paint and patching compounds used on walls and ceilings among the places asbestos may be found. It says you generally cannot tell by looking, that you should not saw, sand, scrape or drill such material, and that material in good condition which will not be disturbed is not likely to pose a risk. If repairs will mean sanding an old textured ceiling or old patches, the EPA suggests having a trained, accredited professional inspect first, and says taking samples yourself is not recommended.

What if the damage came from water?

Then the wall may need more than patching. The EPA says to dry water-damaged areas within 24 to 48 hours to prevent mold, and that porous materials such as ceiling tiles and carpet may have to be thrown away if they become moldy. It also lists the back of drywall among the places mold hides. The Pennsylvania Department of Health goes further for drywall: it says materials such as drywall, carpet or insulation must be removed and replaced where mold grew within, behind or under them.

Above all, the EPA says, do not paint over mold. Clean it, dry the surface, and fix the leak first.

Who should do the repairs?

For a small hole in a newer house, Angi prices a do-it-yourself kit at $10 to $30. In a pre-1978 house, the picture changes: a paid repair that disturbs more than six square feet of paint in a room is covered work for a certified firm, and the EPA recommends a lead-safe certified contractor even when homeowners could legally do the work themselves. Painting is a home improvement under Pennsylvania law, so the repair and the painting can be written into the same contract, with the repair described as specifically as the paint.

Wallpaper removal covers the job that often comes first, the lead rule for older homes explains what a certified firm must do, and painters who take on repairs are on the painters directory page.

Sources

1. How Much Does Drywall Repair Cost? [2026 Data], Angi
2. How Much Does Plaster Repair Cost? [2026 Data], Angi
3. How Much Does It Cost to Paint the Interior of a House? [2026 Data], Angi
4. 34 Pa. Code § 403.62. Permit requirements and exemptions., Commonwealth of Pennsylvania (Pennsylvania Code)
5. Get a Building Permit, City of Philadelphia
6. Frequent Questions About Renovations Covered by the RRP Rule, U.S. Environmental Protection Agency
7. Protect Your Family from Exposures to Asbestos, U.S. Environmental Protection Agency
8. Learn About Asbestos, U.S. Environmental Protection Agency
9. A Brief Guide to Mold, Moisture and Your Home, U.S. Environmental Protection Agency
10. Lead Poisoning Frequently Asked Questions, Pennsylvania Department of Health
11. Preventative Home Maintenance, NC State Extension