Quick answer
Mold work in Concourse and Highbridge is mostly in five- and six-story apartment buildings, many from the 1920s and 1930s. The usual causes are leaking risers and bathroom plumbing, roof leaks on the top floor and condensation in cold corner rooms. We work with owners and managing agents to fix the cause, remove the mold inside containment, dry the framing and keep the records a reinspection asks for.
Updated September 2026
Local conditions
Why mold is a building issue here
By the mid-1930s, almost 300 apartment buildings had gone up along the Grand Concourse, most of them five or six stories high. In 2011 the city designated a historic district from East 153rd to East 167th Street, home to the largest concentration of Art Deco residential buildings in the country, most of them built in the 1920s and 1930s.
Away from the boulevard, walk-ups dominate. Bronx Community District 4, which takes in Highbridge, Concourse and Mount Eden, counted 1,101 multifamily walk-up lots and 304 multifamily elevator lots against 736 one- and two-family lots, and it had 146,441 residents in 2010. Apartment buildings make up most of the district.
That makes mold a landlord matter. Local Law 55 requires owners of buildings with three or more apartments to inspect for mold every year and fix the underlying cause, and HPD sets deadlines by size: 90 days under 10 square feet, 60 days from 10 to 30, and 24 hours at 30 square feet or more.
Jobs we do most in Concourse and Highbridge
Apartment buildings and violation deadlines drive most of our work here. Each job has its own page.
HPD Mold Violation Remediation
Correcting open mold violations, cause first, with records for reinspection.
Apartment Mold Remediation
Containment and removal inside occupied units, with hallways protected.
Hidden Leak Detection
Tracing stains along risers and through stacked bathrooms.
Bathroom Mold Removal
Growth behind tile and in ceilings under old bathroom plumbing.
Ceiling Mold Removal
Top-floor ceilings wet from roof and parapet leaks.
Mold Inspection
Moisture mapping when a building has repeat complaints and no clear source.
Working with owners, managing agents and tenants
In a stacked building, one leaking riser can put mold in several apartments. We map moisture floor by floor before anything is opened, so the owner fixes the riser once and we remove the growth in each unit in the same visit where we can.
Each unit gets its own record: the cause found, the repair, the area removed and the final readings, with photos. Owners use it to show HPD the violation was corrected, and tenants can see exactly what was done in their home.
More in The Bronx
Nearby areas we also cover
University Heights Mott Haven & Melrose Yonkers All coverage
Questions from Concourse & Highbridge
Yes. We trace the shared cause first, then remove the growth unit by unit, usually in one visit.
Not inside the apartment. Interior mold work follows the same steps; exterior changes are what need approval.
HPD gives 24 hours for mold of 30 square feet or more, the Class C level.
Yes. We can inspect and document what we find, and the owner is responsible for the repair.