MD State Guide
Home improvement costs in Maryland.
Locally calibrated cost data for fifty trades, plus the permit rules, code gotchas, and building conditions that actually matter when you plan a project in Maryland.
Updated May 2026
Cost calibration
Maryland costs are about 8% above the national average.
Maryland runs above the national average, driven by DC-suburb labor rates in Montgomery and Prince George's counties. Baltimore and the Eastern Shore are more moderate. Two state-specific factors shape budgets: Maryland's strict lead-paint law (one of the toughest in the country, aimed at Baltimore rowhouse stock) and Chesapeake Bay Critical Area rules that govern stormwater and construction near the water.
BEA RPP
1.083×
Regional Price Parity
BLS Labor Index
1.1×
Trades-labor metro adjustment
Permits
Permits in Maryland.
Maryland enforces the Maryland Building Performance Standards (based on the IRC) statewide, with county and municipal enforcement. Maryland requires a Home Improvement Commission (MHIC) license for any contractor doing residential improvement work — one of the stronger licensing regimes in the country. Electrical and plumbing require separate state licensing.
Where to file: County or city permits office. Montgomery, Prince George's, Baltimore County, and Baltimore City have online portals. Plan review 2-4 weeks in the DC-suburb counties; faster elsewhere. Chesapeake Bay Critical Area projects get additional environmental review.
| Trade | Required when | Citation | Typical fee | Homeowner DIY? |
|---|---|---|---|---|
| Plumbing | In-wall work, fixture changes, water heater, gas | MD Plumbing Code; state licensing | $75-$300 | NoMaryland requires licensed plumber for most permitted work |
| Electrical | New circuits, panel work, service upgrades, EV charger | MD Electrical Code; NEC | $75-$300 | ConditionalOwner-occupied may self-perform in some counties; many require licensed electrician |
| Mechanical (HVAC) | Heat pump install, ductwork, refrigerant | MD Mechanical Code | $100-$300 | NoLicensed HVAC contractor required |
| Building (structural) | Additions, structural modifications, decks | MD Building Performance Standards | $150-$1,000 | YesMHIC-licensed contractor required if hiring |
| Roofing | Re-roofs, structural deck repair | Local jurisdiction | $75-$300 | YesEastern Shore coastal counties require enhanced fastening |
| Lead paint (pre-1978) | Disturbing painted surfaces in pre-1978 housing | MD Reduction of Lead Risk in Housing Act | $300-$1,500 | NoMDE-accredited contractor required; one of the strictest lead laws in US |
Code highlights
What catches DIYers in Maryland.
Five code rules that show up on inspector reports more than any others. Catch them before demo day.
Maryland lead-paint law (one of the strictest in the US)
Maryland's Reduction of Lead Risk in Housing Act imposes strict requirements on pre-1978 housing, especially rentals. Renovation work disturbing painted surfaces requires MDE-accredited lead-safe contractors. Baltimore's vast rowhouse stock makes this a near-universal consideration. Budget $300-$1,500 extra per project and verify accreditation before hiring.
Chesapeake Bay Critical Area rules
Property within 1,000 feet of tidal waters (much of the Eastern Shore, Annapolis, and bay-front areas) falls under Critical Area regulations. New impervious surface, additions, and land disturbance trigger stormwater management and sometimes reforestation requirements. These reviews can add weeks and cost to a waterfront project.
MHIC contractor licensing
Maryland requires a Home Improvement Commission license for residential improvement contractors. Hiring an unlicensed contractor voids your access to the state Guaranty Fund (which compensates homeowners for contractor fraud). Always verify the MHIC number.
Stormwater management (statewide)
Maryland has aggressive stormwater rules statewide, not just in the Critical Area. Projects adding impervious surface (driveways, patios, additions) may require rain gardens, drywells, or permeable paving. Adds $1,000-$4,000 to surface-expanding projects.
DC-suburb permit timing
Montgomery and Prince George's county permit review for additions and ADUs can take 4-8 weeks. Project timelines in the DC suburbs are constrained by plan review as much as construction. Submit complete drawings to avoid correction cycles.
Local building conditions
What changes in Maryland.
Maryland combines DC-suburb cost pressure, Baltimore's old rowhouse stock with the strictest lead law in the country, and Chesapeake Bay environmental rules. The regulatory layer is heavier than most states.
Lead-paint regulation
Strictest in the US; targets Baltimore + pre-1978 stock
MDE-accredited contractors required for painted-surface work in pre-1978 homes. Budget $300-$1,500 per project. Near-universal in Baltimore renovation.
Chesapeake Bay Critical Area
Within 1,000 ft of tidal water (Eastern Shore, Annapolis, bay-front)
Stormwater + land-disturbance review on additions and impervious surface. Adds weeks and cost to waterfront projects. Verify Critical Area status before scoping.
Frost line depth
30 inches statewide
Standard residential frost-line for footings. Frost-heave on older walkways and porches is a common pre-renovation finding.
Coastal wind (Eastern Shore)
110-120 mph design wind on the lower Eastern Shore
Coastal roofs and additions need wind-rated assemblies. Inland Maryland uses standard wind framing.
DC-suburb labor premium
Montgomery + Prince George's 20-35% above state average
DC-metro labor rates drive Maryland costs in the western counties. Baltimore and the Eastern Shore are more moderate.
Stormwater rules (statewide)
Aggressive stormwater management statewide
Surface-adding projects may require rain gardens or drywells. Budget $1K-$4K for stormwater compliance on additions and new patios.
Cost data
Top home improvement projects in Maryland.
Hire-it-out cost ranges for the most-searched projects, calibrated to Maryland labor + materials.
| Project | Cost range | Difficulty |
|---|---|---|
| AC Replacement → | $4,900–$9,800 | Hard |
| Attic Insulation → | $1,600–$3,800 | Moderate |
| Backsplash Tile → | $900–$2,700 | Easy |
| Baseboard & Trim Installation → | $800–$3,300 | Easy |
| Basement Finishing → | $16,400–$54,600 | Hard |
| Bathroom Remodel → | $7,100–$19,600 | Moderate |
| Bathroom Vanity Installation → | $400–$1,600 | Moderate |
| Cabinet Refacing → | $4,400–$13,100 | Moderate |
| Carpet Installation → | $800–$2,700 | Moderate |
| Ceiling Fan Installation → | $200–$700 | Moderate |
Need a specific project priced for your zip? Open the calculator →
Local contractors
Maryland Local Pros.
Maryland is on the Local Pros roadmap. We are sourcing from r/baltimore, r/maryland, and DC-area subreddits, NextDoor recommendations, and MHIC + state trade licensing records. DC-suburb, Baltimore, and Eastern Shore contractors filtered separately because of distinct regulatory specialization.
See Maryland Local Pros →Plan your Maryland project