Baltimore, MD
NEW ADDITIONS ESTIMATING.
QUICK ANSWERS.
Do I need a Maryland Home Improvement Contractor (MHIC) license to pull addition permits in Baltimore?
Yes. Maryland requires an MHIC license for any contractor performing home improvement work valued over $500. Baltimore City additionally requires a city contractor registration. You must carry both to pull permits in the city. Baltimore County has its own contractor licensing requirement separate from the state MHIC.
LOCAL FACTS.
Baltimore-area framing and rough carpentry labor runs approximately $28–$38/hr for journeyman-level work (BLS Baltimore-Columbia-Towson MSA, Occupational Employment data). Finish carpentry and trim trades run $32–$45/hr depending on specialty.
Baltimore City DHCD calculates building permit fees on a valuation basis. A $120,000 rear addition typically generates a permit fee in the $800–$1,400 range under the current fee schedule, plus a separate zoning filing fee of $250–$400 if a variance or conditional use is required.
Baltimore City has 13 locally designated historic districts, including Broadway East, Otterbein, and Bolton Hill, plus numerous National Register properties. Addition work in these areas requires Baltimore Commission for Historical and Architectural Preservation (CHAP) review before building permits are issued, adding 4–8 weeks to the pre-construction timeline.
Baltimore City zoning typically requires a minimum 20-foot rear yard setback in R-6 and R-7 residential zones, which cover most rowhouse blocks. Many rear addition projects require a variance or rely on accessory structure provisions. Confirming the zoning district and lot depth before bidding is standard due diligence on city rowhouse additions.
THE BID ENGINE.
Addition Estimating Built for Baltimore's Market
Baltimore rowhouse neighborhoods — Federal Hill, Hampden, Canton, Fells Point — present addition work that doesn't fit a cookie-cutter template. You're dealing with shared party walls, shallow rear yards governed by Baltimore City zoning setbacks, historic district overlay reviews, and basement-to-above-grade additions that require load path documentation before permits move. A generic spreadsheet doesn't account for any of that.
Estimate.Pro is built for the way addition contractors actually work: walking a site, measuring what's there, and turning that into a priced scope fast.
From Walkthrough to Bid in 8 Minutes
The 8-minute median is real. You open the app on-site, complete a guided walkthrough for the addition scope — footprint, foundation type, framing, exterior cladding, roofline tie-in, window count, finish level — and the AI drafts a line-item scope of work. Material costs pull from your saved workspace. You review, adjust for Baltimore-specific labor rates, and send a professional bid before you leave the driveway.
AR measurement on supported devices gives you live dimensional capture. On older phones or when you're working from photos, measurements are flagged as estimates so your client knows what's confirmed versus preliminary.
What Addition Scopes in Baltimore Actually Require
Baltimore City and Baltimore County differ significantly in permitting and code application. City jobs fall under the Baltimore City Building Code, which adopts the International Building Code with local amendments. County jobs follow Baltimore County's adopted codes. Both require:
- Structural drawings for any addition that modifies the existing load path, which is nearly every rear addition on a rowhouse.
- Zoning clearance before permit issuance — rear yard minimums, lot coverage maximums, and height limits vary by zoning district.
- MDE stormwater review for additions over 5,000 square feet of disturbed area, though many contractors trigger this sooner on tight urban lots.
- Historic review if the property sits in one of Baltimore's 13 local historic districts or falls under a National Register district with local designation.
Estimate.Pro lets you document scope items that flag these dependencies — foundation inspection hold points, framing inspection stages, insulation pre-drywall — so your bid narrative matches what the inspector will actually look for.
Pricing Structure That Fits a Small Crew
You don't pay a percentage of every job you win. The platform fee on Free tier is 3% on payments processed through Stripe Connect. Upgrade to Pro at $39 per seat per month and that fee drops to 0%. Elite at $79 per seat per month adds invoice exports and the full Stripe Connect workflow. If you're running a crew and billing multiple estimators, the Crew plan is $399 flat per month.
There is a free tier with no credit card required. You can build and send bids before you decide whether the paid tier makes sense for your volume.
Material Cost Reality in the Baltimore Metro
Lumber prices at regional suppliers — 84 Lumber in Jessup, Builders FirstSource locations in the metro — fluctuate enough that locking in a bid number without a validity window is risky. Estimate.Pro's saved material cost workspace lets you update your framing lumber, sheathing, and insulation costs in one place and have that change push through every active estimate. When OSB moves 15% in a month, you update once, not across 12 open files.
Concrete flatwork and block for foundations tracks separately. Addition contractors in Baltimore often sub out foundation work; Estimate.Pro lets you line-item subcontractor allowances with markup held at whatever margin you set.
Who This Is For
Addition contractors doing 10 to 60 additions per year in Baltimore City, Baltimore County, Anne Arundel County, and Howard County. If you're quoting rear bump-outs, second-story additions, garage conversions to living space, or full in-law suite additions, the scope templates in Estimate.Pro match the actual line items those jobs produce.
You don't need a dedicated estimator to produce a professional bid. You need 8 minutes and a phone.
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Create your free account, walk your next job, and send the bid. If the estimate doesn't hold up on-site, nothing cost you anything. That's the right way to evaluate a tool.
Bid faster in Baltimore.
14-day Pro trial, no card. Free forever fallback. Built for addition contractors.