How to Choose a Plaster Contractor in Baltimore: What Homeowners Need to Know

Baltimore and its surrounding counties have tens of thousands of older homes with original plaster walls — and not many contractors who actually know how to work with them. When plaster cracks, sags, or separates, most homeowners have no idea where to start. This guide tells you what to look for, what to ask, and what to avoid.

1. Verify the Maryland MHIC License

In Maryland, any contractor performing home improvement work for compensation must hold a Maryland Home Improvement Commission (MHIC) license. This is not optional — it's state law. Hiring an unlicensed contractor means no consumer protections, no recourse through the MHIC Guaranty Fund if something goes wrong, and potential liability issues if a worker is injured on your property.

Before signing anything, ask for the contractor's MHIC number and verify it at mhic.maryland.gov. The search takes 30 seconds and tells you whether the license is active. Any legitimate contractor will give you their number without hesitation.

2. Confirm Insurance

A licensed contractor should carry two types of insurance: general liability (covers property damage) and workers' compensation (covers injuries to their crew). Ask for certificates of insurance before work begins. If a worker is injured on your property and the contractor lacks workers' comp, you could be held responsible.

Don't accept "we're covered" without documentation. The certificate should show the policy holder's name, insurer, policy number, and coverage period. Verify it hasn't expired.

3. Ask About Experience With Older Homes

Plaster repair in a 1950s Baltimore rancher is not the same as patching new construction drywall. Traditional three-coat plaster systems have specific characteristics — lime-based binders, wood or metal lath, scratch coat, brown coat, finish coat — that require different materials and techniques than drywall compounds. A contractor without experience in older homes may patch the surface without addressing the underlying cause, and the repair will fail.

Ask specifically:

• Have you worked on homes of similar age in this area?
• How do you approach matching existing plaster texture?
• What's your process when you find the cause is structural (foundation settling, lath failure)?

4. Require a Written, Itemized Estimate

A handshake deal or a verbal ballpark is not a contract. Before any work begins, get a written estimate that includes:

• Scope of work (what specifically will be done)
• Materials to be used
• Total cost and payment schedule
• Start and completion timeline
• Warranty or guarantee terms

Maryland law requires that home improvement contracts over $500 be in writing and signed by both parties. If a contractor resists putting things in writing, walk away.

5. Check Google Reviews and the BBB

Plaster is a referral business. Contractors with years of experience in Baltimore City and County have a trail of jobs you can research. Look at:

• Google Business Profile: Read recent reviews, look for patterns in complaints, and check whether the business responds to feedback.
• Better Business Bureau: Check their BBB rating and any filed complaints at bbb.org.
• Neighbors and community groups: Nextdoor, Facebook neighborhood groups, and word-of-mouth from other homeowners in your ZIP code are often the most reliable source.

A 5-star rating with 40+ reviews from verified customers is a stronger signal than a new business with a handful of reviews.

6. Red Flags to Watch For

No written estimate or contract

Already covered above. A legitimate contractor expects paperwork.

Demands cash payment upfront

A reasonable deposit (10–30%) to schedule work is normal. Demanding full payment before any work starts is not. Never pay in full before the job is complete.

Can't provide MHIC number or insurance certificate

This is disqualifying. Do not proceed.

Uses only generic patch products on plaster

Inexperienced contractors sometimes apply joint compound or spackling to plaster cracks. These products shrink, don't bond well to traditional plaster, and fail within a year. A plaster contractor should be using appropriate plaster-compatible materials, not drywall products.

Door-to-door solicitation after a storm

Post-storm contractors who go door-to-door offering to fix damage are a consistent source of fraud complaints in Maryland. The MHIC receives hundreds of complaints about unlicensed "storm chasers" annually. Always initiate the contractor search yourself.

7. Questions to Ask Before Hiring

1. What is your MHIC license number, and can I verify it?
2. Do you carry general liability and workers' compensation insurance?
3. Have you repaired plaster in homes this age and style before?
4. Will you provide a written, itemized estimate?
5. What materials will you use on this repair?
6. How do you match the existing texture?
7. What is the payment schedule?
8. What warranty do you offer on the work?
9. Who specifically will be doing the work — employees or subcontractors?

When to Hire a Specialist vs. a General Contractor

General contractors are good for large renovation projects that involve multiple trades. For targeted plaster repair — cracks, water damage, ceiling sections — a specialty plastering contractor is almost always the better choice. They do this work every day, carry the specific materials, and can match original finishes that a general contractor's drywall sub cannot.

MN Plastering LLC specializes exclusively in plaster repair, stucco, interior painting, drywall, and related finishes. We've been serving Baltimore City and County since 1987. Call (443) 806-8077 for a free written estimate — no pressure, no surprises.