Rooftop feasibility in Park Slope

4-story brownstones, limestone rowhouses, some pre-war co-ops.

Flat roofs on masonry rowhouses are the single most under-used square footage in New York City. The structure is usually already there; what is missing is a load assessment, a set of drawings, and a contractor who has taken this exact building type through the Department of Buildings before.

The Park Slope Historic District and its extensions cover much of the neighborhood.

Landmark status is a design constraint, not a prohibition. The Landmarks Preservation Commission is principally concerned with what is visible from the public way, which in practice means setbacks and sightlines rather than a blanket refusal. Screening for this before an architect is engaged is the cheapest hour you will spend on the project.

• Roof deck
• Rooftop garden

3 phases, in order, from an idea to a buildable project:

1. Your Dream. A 3D render of your actual roof at its real dimensions, plus an automated zoning and Landmarks screen. Free.
2. Our Permits. A licensed architect and engineer stamp your drawings and file them in DOB NOW. You own the approved plans.
3. We Build. Permitted specs go to vetted general contractors who work in Park Slope and come back as real bids.

Modern Rooftop is free for homeowners. Building is not: in Phase 2 you pay a licensed architect directly, with no markup and no cut to us, and in Phase 3 you pay your contractor. We are paid by the contractor, after you have signed.