What is AI property analysis?

AI property analysis uses artificial intelligence to evaluate a property's condition, layout, and features from a walkthrough video. RealtyLens processes the video through a 5-step AI pipeline to generate floor plans, room-by-room condition scores (1-10 scale), issue detection with repair cost estimates, and MLS-ready listing copy — all in under 5 minutes.

How does RealtyLens generate floor plans from video?

RealtyLens analyzes your walkthrough video to detect room transitions, doorways, and spatial relationships. The AI maps room adjacencies and connection types to generate an accurate spatial floor plan — no measuring tape or special equipment needed.

How accurate are the AI condition scores?

RealtyLens provides granular 1-10 condition ratings for every room, assessing walls, floors, ceilings, and fixtures individually. The AI detects cracks, water damage, wear patterns, and other issues with severity levels. While not a replacement for a licensed home inspection, these scores give agents a reliable preliminary assessment for listing preparation.

How long does a property analysis take?

The average analysis takes about 5 minutes from upload to complete report. You record a walkthrough video (typically 3-5 minutes), upload it to RealtyLens (1 minute), and the AI generates everything in approximately 3 minutes.

What does the AI property report include?

A RealtyLens report includes: AI-generated spatial floor plans, room-by-room condition scores (1-10 scale), feature detection (fixtures, appliances, finishes), issue tracking with severity levels and repair cost estimates, natural light assessment, MLS-ready listing copy with headline and highlights, value estimates, and target buyer profiles.

Can RealtyLens replace a home inspection?

RealtyLens is designed to complement — not replace — a licensed home inspection. It gives real estate agents a fast, detailed preliminary assessment for listing preparation, pricing strategy, and client conversations. For formal transactions, a licensed inspector should still be engaged for structural, electrical, and plumbing evaluations.

RealtyLens

for saleRealtyLens property overview

$550,000

421 Crown St Apt 18R

Brooklyn, NY, 11225

View more Brooklyn, NY property pages

3Beds

1Baths

1,153Sqft

$477$/sqft

Listing Notes

This expansive unit, spanning nearly 1, 200 square feet, exudes classic Prewar charm. Nestled in the heart of Crown Heights, this sun-drenched 3-bedroom HDFC Coop offers a prime location with easy access to the multiple subway lines, and proximity to local favorites like Daughter, Ursula, and Raas. The unit is set in a well-maintained building and features a generous living area, three spacious king-sized bedrooms, and a separate eat-in kitchen. Key Features: - Original Prewar architectural details - Gleaming hardwood floors - King-sized bedrooms - Expansive eat-in kitchen - Abundant natural light - Spacious rooms - On-site laundry facilities - Modern Butterfly Intercom System Please note: As an HDFC Co-op, income restrictions apply based on household size. The maximum income for one person is $136, 080, for two people is $155, 520, and for three people is $174, 960, etc. Please call or email to schedule a showing.

Market Insights

Below nearby median-53%

$477/sqft vs a nearby median of $1006/sqft.

Nearby median$1006/sqft

Nearby properties12

Property size1,153 sqft

-53% versus the nearby median price per square foot.
Price history is limited, so current comps matter more than trend alone.
1,153 sqft creates a usable price-per-square-foot read.

Pricing Read

Yardstick fair value$1.06M$979k – $1.15M · 60% confidence

vs ask $550k−$514k (−93.5%)

Asking price is about 93.5% below the fair value — likely to draw competing offers if it's still on market.

$1,014/sqft median across 8 tight comps × 1,153 sqft= $1.17M

Open Class C HPD violations−$70k −6.0%
Days-on-market gravity−$35k −3.0%
Pre-war character+$29k +2.5%
Sparse street life−$18k −1.5%
Visible condition issues−$18k −1.5%
Transit access+$6k +0.5%

Cumulative NYC adjustments−$105k−9.0%

Property Read

FreshnessCurrent market data

The listing facts are current enough for an initial property review.

Market Position-53% vs nearby

The asking price per square foot is below the nearby median, which can be worth a closer comp check.

Price MovementInitial price point

Price history is still limited; review again as more market activity becomes available.

Diligence Read3 items to check

AI ReadinessReady to analyze

Assistant read

Generate a buyer-agent read of this listing — pricing, risks, comp check, and negotiation leverage. Takes a few seconds.

Generated from the facts shown on this page and nearby market data. Not a professional appraisal.

Listing Details

Days on market: 188 days
Last price change: No change recorded
Listed: Nov 5, 2025
Photos: 9 photos
Property type: coop
Status: for sale

Features & Amenities

Security FeaturesHardwood Floors

Photos

Building Facts

Year built: 1923
Stories: 4
Total units: 39
Residential units: 39
Building area: 1.03 ac
Lot size: 12,775 sqft
Land use: Multi-family walk-up buildings
Building class: C6

From NYC public records where available.

Price History

May 4, 2026Initial record

$550,000for sale

Public Records

DOB violations18 open

18 total recorded against the building

HPD violations117 open

30 class C (immediately hazardous)

ACRIS documents19

Tax-lot deed, mortgage, and transfer records on file

311 calls (12 mo)34,400

Top: heat/hot water

Top complaint types in ZIP 11225

HEAT/HOT WATER5,538
Illegal Parking3,881
Noise - Residential3,864
UNSANITARY CONDITION1,814
Noise - Street/Sidewalk1,654

Recent DOB

Nov 26, 2024V-DOB VIOLATION - ACTIVE · AEUHAZ1-FAIL TO CERTIFY CLASS 1 NONE
Aug 2, 2024V-DOB VIOLATION - ACTIVE · BENCH-FAILURE TO BENCHMARK NONE
May 2, 2024V-DOB VIOLATION - ACTIVE · BENCH-FAILURE TO BENCHMARK NONE
Jan 10, 2024V-DOB VIOLATION - ACTIVE · AEUHAZ1-FAIL TO CERTIFY CLASS 1 NONE

Recent HPD

May 4, 2026Class A · (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD S WEBSITE, WWW.NYC.GOV\HPD, SEARCH BE...
Feb 19, 2025Class B · § 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE THE COUNTER BALANCE OF THE LOWER SASH AT THE 2ND WINDOW FROM SOUTH AT WEST IN THE 3rd ROOM FROM EAST LOCATED AT...
Feb 19, 2025Class C · § 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE COUNTER BALANCE OF THE LOWER SASH AT THE 3RD WINDOW FROM EAST AT SOUTH IN THE 2nd ROOM FROM EAST LOCATED AT APT...
Feb 19, 2025Class C · § 27-2026 ADM CODE REPAIR THE LEAKY AND/OR DEFECTIVE FAUCETS HOT WATER FAUCET IN THE BATHROOM LOCATED AT APT 12AL, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTH

Sourced from NYC Open Data (DOB, HPD, ACRIS). Updated as the city republishes — check the original source for live status.