Four-Unit Conversion, Egress Windows, and Fire Separation in Columbia Heights

Start with the emergency escape and rescue opening requirements applied to each sleeping area. The opening must provide a net clear opening of at least 5.7 square feet, a minimum clear height of 24 inches, a minimum clear width of 20 inches, and a sill no more than 44 inches above the floor. The basement window fails on the sill at 47 inches, and a sliding window's net clear opening is smaller than its rough opening, so the 30-by-54 dimension must be measured at the clear opening, not the frame. The window well is also questionable: when the well is deep enough to require it, it needs at least 9 square feet of area and a 36-inch horizontal projection, and a ladder may be required. A 30-inch projection does not meet the projection dimension if the well is governed, so enlarge it or redesign. The second-floor casement is closer to compliance on sill height and size, but the net clear opening of a casement is reduced by the sash and crank, and opening onto a deck only works if the deck provides a safe path to grade. The 34-inch stair is below the 36-inch clear width required for a means of egress. None of these can be waived by the contractor; they require revised plans.

Going from two units to four changes the building's occupancy classification and the required separations. Dwelling-unit separation, corridor and stair protection, and the rating of any new openings in the existing party walls need to be confirmed by the design professional. The existing brick party walls are often substantial enough, but new chases, ducts, and door openings can destroy the rating if they are not protected. The unit count also triggers smoke and carbon monoxide alarm coverage, interconnection, and possibly sprinkler requirements depending on the code edition and the building's height and area. On the zoning side, four units may exceed what the zone allows by right; the lot occupancy, rear addition, and parking or bicycle-parking requirements must be checked, and a special exception or variance may be needed. The permit set should reflect the final unit count, because a permit issued for two units will not cover four. Framing before these questions are answered risks a stop-work order and a redesign after the walls are up.

Decline to start, and put the refusal in writing with the schedule consequences. Demolition and framing without a permit expose the contractor to a stop-work order, civil infractions, double permit fees, and an order to remove or legalize work, all of which cost more than the delay. There may also be a separate demolition or raze permit and an asbestos survey requirement before interior demolition, especially in an older rowhouse. Starting early also creates an insurance problem: if the policy excludes work before permit or the work is outside the scope of coverage, an injury or collapse may not be covered. The productive path is to push the permit package, respond to plan-review comments, and line up the trade contractors so framing starts the day the permit is issued. If the owner insists, offer a limited, permitted scope such as protected interior demolition that is expressly allowed, and get the owner's written direction only for work that is legally authorized. Do not let a verbal instruction override the permit requirement.