Rowhouses in Baltimore all fail in the same places. Learn where to look and a fifteen-minute walk tells you whether you're staring at a $10k problem or a $60k one.

**Flat roofs tell the truth first.** Almost every city rowhouse has a built-up flat roof. Sight the gutter line from the alley — if it sags between the downspouts, the deck underneath is rotting. Alligatored seams, ponding stains near the drain, soft spots underfoot: all signs a tear-off is coming. A contractor-grade replacement on a 16-foot row runs $5k–$12k depending on access.

**Efflorescence is the basement's confession.** That white powder on masonry walls means water is moving through the block. My first basement photo is always the base of the walls: efflorescence, dark stains at the floor line, patches that flake when scraped. A sump pit with no pump means the last guy knew — and left.

**Old electrical is an insurance problem, not just a safety one.** Knob-and-tube or a fuse box can make a property uninsurable until it's rewired, which wrecks the budget and the lender's appetite in the same week. Shoot the panel with the cover off before you do anything else.

**Plaster cracks telegraph settlement.** Hairlines are cosmetic. Diagonal cracks off door and window corners, doors that won't latch, floors that roll — that's the foundation talking. Spongy plaster by the bath means the leak is still active.

**Comps.** Quick look at the numbers around it: as-is shells carrying these exact problems — 1319 Mosher St, 21217 sold $13,500 (June 2026, Housing Authority auction, vacant); 1344 N Carey St, 21217 sold $14,000 (May 2026, auction, vacant); 2605 E Preston St, 21213 sold $32,500 (April 2026, auction, vacant). That puts as-is value roughly $13,500–$32,500, most likely around $15,000–$20,000 for a true shell. Renovated: 1510 Medford Rd, 21218 sold $285,000 (April 2026, move-in ready 3BR/2BA); 237 E 25th St, 21218 sold $330,000 (May 2026, finished basement, very good condition); 29 N Patterson Park Ave, 21231 sold $425,000 (August 2026, finished lower level, private parking). So a renovated range of $285,000–$425,000. Honesty gap: the renovated comps sit in Charles Village and Patterson Park, not the same blocks as the shells — location does some of that lifting, not condition alone. And 237 E 25th St carries $120/year ground rent, so read the fine print.

Which red flag has killed the most deals for you — water, roof, or electrical?

— Dawon | Baltimore, MD