# 3866 Laconia Avenue, The Bronx

Single family · built c. 1910 · Block 4716, Lot 5.

On Umarelli: https://umarelli.org/nyc/2047160005/3866-laconia-avenue

More construction in Baychester: https://umarelli.org/nyc/bronx/baychester.md

## Building permits

- New Building — Multi-Family, filed Sep 16, 2026, 21 units, 4 stories, described as “Proposed new four-story and penthouse building.”
- Alteration, filed Sep 15, 2026, estimated cost $160, described as “Proposed 8FT construction fence. No change to use, egress or occupancy under this application.”
- Demolition, filed Sep 5, 2025, estimated cost $70K, described as “Full demolition to a one story building”
- Demolition, filed Sep 5, 2025, estimated cost $15K, described as “Full demolition to a one story garage”
- Demolition, filed Sep 5, 2025, estimated cost $15K, described as “Full demolition to a one story rear structure”

## Property taxes

- Assessment: $28,080
- 2026–27 tax: $5,411
- Market value (city estimate): $468,000
- Taxable value: $27,268
- Assessed land: $14,280
- Assessed improvements: $13,800

## Zoning

R5D: floor area ratio 0.15 built, 2.00 allowed by base zoning.

## Recent sales

- May 22, 2025: $475,000, 644 sq ft ($738 per sq ft)

Open-market sales since 2016, from the Department of Finance’s sales files.

## Flood zone

Current FEMA flood map: zone X, minimal flood hazard.

## In the news

[Permits Filed for 3866 Laconia Avenue in Williamsbridge, The Bronx](https://newyorkyimby.com/2026/09/3866-laconia-ave-in-williamsbridge-the-bronx.html), New York YIMBY, Sep 19, 2026.

From New York City and Jersey City public records, refreshed within a day of each release. Sources: https://umarelli.org/sources. Methodology and corrections: https://umarelli.org/methodology