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

$2,300,000

521 Decatur St

Brooklyn, NY, 11233

View more Brooklyn, NY property pages

8Beds

6Baths

3,240Sqft

$710$/sqft

Market Insights

Near nearby median+0.6%

$710/sqft vs a nearby median of $706/sqft.

Nearby median$706/sqft

Nearby properties8

Property size3,240 sqft

+0.6% versus the nearby median price per square foot.
Price history is limited, so current comps matter more than trend alone.
3,240 sqft creates a usable price-per-square-foot read.

Pricing Read

Yardstick fair value$2.28M$2.07M – $2.48M · 48% confidence

vs ask $2.30M+$24k (+1.0%)

Asking price is well-anchored to the comp picture (+1.0%). Negotiate on terms, not headline price.

$706/sqft median across 3 tight comps × 3,240 sqft= $2.29M

Days-on-market gravity−$69k −3.0%
Pre-war character+$57k +2.5%
Transit access+$11k +0.5%
Visible condition issues−$11k −0.5%

Cumulative NYC adjustments−$11k−0.5%

Property Read

FreshnessCurrent market data

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

Market Position+0.6% vs nearby

The property is close to nearby price-per-square-foot levels, so the decision will likely come down to condition and layout.

Price MovementInitial price point

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

Diligence Read1 item 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: 648 days
Last price change: No change recorded
Listed: Aug 2, 2024
Photos: 18 photos
Property type: townhomes
Status: for sale

Photos

Building Facts

Year built: 1906
Stories: 3
Total units: 4
Residential units: 4
Building area: 3,240 sqft
Lot size: 1,867 sqft
Land use: Multi-family walk-up buildings
Building class: C3

From NYC public records where available.

Price History

May 4, 2026Initial record

$2,300,000for sale

Public Records

DOB violations0 open

0 total recorded against the building

HPD violations14 open

28 total recorded

ACRIS documents24

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

311 calls (12 mo)33,344

Top: noise - residential

Top complaint types in ZIP 11233

Noise - Residential5,476
HEAT/HOT WATER3,512
Illegal Parking2,840
UNSANITARY CONDITION1,950
PLUMBING1,221

Recent HPD

Apr 15, 2026Class C · § 27-2037, 2038 HMC: PROVIDE A SAFE AND ADEQUATE SUPPLY OF ELECTRIC SERVICE TO THE FIXTURES AT CEILING AT PUBLIC HALL AND PUBLIC HALL STAIRS AT ALL STORIES
Dec 7, 2025Class B · § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING IN THE 2nd BATHROOM FROM NORTH LOCATED AT APT 4, 3rd STORY, 1st APAR...
Nov 21, 2025Class A · § 26-1103 ADMIN. CODE: POST AND MAINTAIN A PROPER NOTICE ON WALL OF THE ENTRANCE STORY IN ENGLISH AND SPANISH ON THE AVAILABILITY OF THE AGENCY S HOUSING INFORMATION GUIDE. A SA...
Nov 21, 2025Class A · § 27-2005 HMC: POST, IN A FORM APPROVED BY THE COMMISSIONER, AND MAINTAIN A NOTICE IN A COMMON AREA OF THE BUILDING REGARDING THE PROCEDURES THAT SHOULD BE FOLLOWED WHEN A GAS L...

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

You can also find this listing on StreetEasy.

Listing data sourced from streeteasy.com. RealtyLens enriches and contextualises it for you, but the original listing lives on the source.