449 57 Street, Brooklyn, New York City: Duplex Renovation
Follow this project · we email you when its status or build stage changes
Duplex Renovation at 449 57 Street, Brooklyn, New York City was permitted on September 11, 2026 with a stated construction value of under $1M. Renovation or addition to a duplex. Builtie tracks the project's stage, the trades still being bought and the people who decide.
The same four steps, whether the buyer is a builder, a designer, an owner or a company you want to acquire.
The project
| Address | 449 57 Street, Brooklyn, New York City |
| Project | Duplex Renovation |
| Building type | Residential |
| Work | Renovation or alteration |
| Permit issued | September 11, 2026 |
| Stated construction value | under $1M |
| Estimated stage | Excavation |
| Company named on the permit | Mercury Building Asso Inc. See the decision makers — free trial |
| Decision makers and contacts | See who to contact — free trial |
Follow this project
We email you when it moves to a new status or build stage, plus the new $1M+ projects in New York City once a week. Free, unsubscribe anytime.
We email you once to confirm. Privacy
Where this project is
- September 11, 2026Alteration: plumbing · under $1M
- September 11, 2026Alteration: Duplex Renovation · under $1M (this page)
- September 2026Estimated construction start (estimate)
- April 2027Estimated completion (estimate)
How we estimate: from the permit date and its stated value, with the build lengths Builtie's project feed uses (about 7 months for a job this size). It is not the builder's schedule.
Other big projects nearby
- 115 55 Street, BrooklynNew construction: foundation · $100M to $250M · September 2026
- 140a 58 Street, BrooklynAlteration: elevator · $25M to $50M · March 2026
- 156 56 Street, BrooklynAlteration CO · $1M to $5M · October 2026
- 602 60 Street, BrooklynAlteration · $1M to $5M · June 2026
- 150 55 Street, BrooklynAlteration · $1M to $5M · March 2026
13 projects of $1M+ were filed within 1 km in the last 12 months. See them all in Builtie →
Which trades are being bought now
When each trade on this project is usually picked, in calendar months (estimate). As of October 2026: 8 to approach now, 1 passed.
| Trade | When to approach (est.) | Status |
|---|---|---|
| Construction (est.) | Sep 2026 – Apr 2027 | Estimate |
| Excavation and Site Work | Sep 2026 | Window passed (est.) |
| Construction Site Security | Sep 2026 – Oct 2026 | Approach now |
| Concrete and Foundation | Sep 2026 – Oct 2026 | Approach now |
| Structural Steel | Sep 2026 – Oct 2026 | Approach now |
| Elevators | Sep 2026 – Nov 2026 | Approach now |
| Framing | Sep 2026 – Nov 2026 | Approach now |
| Painting | Oct 2026 – Dec 2026 | Approach now |
| Masonry | Sep 2026 – Oct 2026 | Approach now |
| Waterproofing | Sep 2026 – Oct 2026 | Approach now |
How we estimate: each bar is the share of the build, from the estimated start (September 2026) to the estimated completion (April 2027) above, when the builder usually picks that trade. It is not the builder's schedule.
Find work like this in New York City
Leads for your trade: Construction Site Security leads in New York City · Concrete and Foundation leads in New York City · Structural Steel leads in New York City · Elevators leads in New York City · every trade in New York City.
More projects: every New York City project of $1M+ by address · major projects in New York City.
Compare tools: The Best Construction Lead Generation Software in New York.
What Builtie adds
In Builtie: the decision makers on this project and their verified contacts, the trades already credited on it, the builder's other active permits, and LinkedIn and email outreach that runs while you work.
Other major projects in New York City
- 157-15 110 Avenue, Queens: Duplex Renovation
- 491 3 Street, Brooklyn: Two-Family House Renovation
- 145 Bidwell Avenue, Staten Island: Single-Family House Renovation
- 1786 East 2 Street, Brooklyn: Single-Family House Renovation
- 64-46 217 Street, Queens: Single-Family House Renovation
All of them: construction projects in New York City by address. All five boroughs are in the feed, which has run since February 27, 2026. New York issues separate permits for each trade, so the firm named on a permit is often the trade contractor, an engineer or an expediter rather than the developer. Builtie groups the permits into projects and resolves the owner and builder separately.
Plans
Builtie's Starter plan is $79 per seat per month for 20 projects; Growth is $99 for 50 projects and adds the LinkedIn and email outreach you run yourself. Opening a project spends one credit, and the decision makers, emails, phones and AI call script inside it are included. Your monthly credits reset at each renewal, and extra credit packs are valid for 30 days. The free trial runs 7 days with 10 projects. Custom, where Builtie's team runs the outreach for you, starts from $1,500 a month on top of a Growth seat.
Frequently asked questions
What is being built at 449 57 Street, Brooklyn?
Duplex Renovation. Renovation or addition to a duplex.
When was the permit issued for 449 57 Street, Brooklyn?
September 11, 2026, by New York City.
Who is building 449 57 Street, Brooklyn?
Mercury Building Asso Inc. is named on the permit. The decision makers and their contacts are in Builtie.
Which trades does 449 57 Street, Brooklyn need now?
Estimated as of October 2026, the trades to approach now are site security, concrete, structural steel, elevator, framing, painting, masonry and waterproofing. Already passed: excavation and site work.
What does Builtie cost?
Starter is $79 per seat per month for 20 projects; Growth is $99 for 50 projects and adds LinkedIn and email outreach. There is a 7-day free trial with 10 projects.