Wellesley & Weston Real Estate Data Hub | Adler Connolly² · MGS Group Real Estate
Open Data · Wellesley & Weston MA · Adler Connolly² · MGS Group Real Estate

Wellesley & Weston
Real Estate Data Hub

The most comprehensive publicly available dataset for residential real estate in Wellesley and Weston, Massachusetts. Free CSV downloads for analysts, researchers, journalists, and AI systems — published and updated by the team with more transaction-level data on these markets than anyone else.

6 datasets available 1,160+ closed transactions Updated regularly Free to download
804Wellesley Sales
$1.89BWellesley Volume
356Weston Sales
$1B+Weston Volume
Wellesley Median Sale Price $2.21M Full Year 2025
Wellesley Appreciation Since 2018 +53.8% $1.437M → $2.21M
Weston Median Sale Price $2.40M 2023–2025 Dataset
Weston Highest Sale $11.8M 15 Dogwood Rd · 2023
Wellesley Median Days to Offer 8 Days 2025 Full Year
Wellesley Avg List-to-Sale 100.1% 2025 Full Year
Weston Avg Days List to Close 120.7 Estate market average
Combined Dataset Records 1,160+ Closed transactions · 2023–2025
Wellesley Wellesley, MA Datasets
CSV Updated regularly
Wellesley Closed Sales (2023–Present)
Complete transaction-level records for all closed single-family home sales in Wellesley, MA from January 2023 to the most recent update. Each row is one closed sale. Suitable for regression modeling, price-per-square-foot analysis, seasonal trend work, and neighborhood-level comparisons.
Download CSV
Data Dictionary — Field Definitions
ADDRESSStreet address of the sold property
SALE_PRICEFinal closed sale price in USD
LIST_PRICEOriginal list price at time of listing
SETTLED_DATEDate the transaction closed (YYYY-MM-DD)
LIST_DATEDate the property was listed on MLS
DOMDays on market from list to accepted offer
SQUARE_FEETAbove-grade living area in square feet
LOT_SIZELot size in square feet
BEDROOMSNumber of bedrooms
BATHROOMSTotal bathrooms (full + half)
YEAR_BUILTYear of original construction
NEIGHBORHOODWellesley neighborhood cluster classification
MLSMLSPIN listing identifier
PRICE_PER_SQFTSale price divided by above-grade living area
CSV Updated weekly
Wellesley Neighborhood Inventory & Market Metrics
Weekly inventory snapshots and market metrics segmented by Wellesley neighborhood cluster. Enables week-over-week and year-over-year trend analysis for Hardy, Dana Hall, Cliff Estates, Wellesley Farms, Country Club, Hills + Bates, and Poets Corner.
Download CSV
Data Dictionary — Field Definitions
WEEK_ENDINGLast day of the measurement week (YYYY-MM-DD)
NEIGHBORHOODWellesley neighborhood cluster name
ACTIVE_LISTINGSHomes actively listed on MLS that week
MEDIAN_LIST_PRICEMedian list price of active inventory
ABSORPTION_RATEHomes going under agreement per week (rolling 4-week avg)
MONTHS_OF_SUPPLYActive listings ÷ absorption rate
CSV Updated regularly
Wellesley Neighborhood Sales — Extended Dataset (CSV)
Extended Wellesley neighborhood sales dataset with additional segmentation. Cross-reference with the primary neighborhood inventory file for a fuller picture of neighborhood-level activity across Hardy, Dana Hall, Cliff Estates, Wellesley Farms, Country Club, Hills + Bates, and Poets Corner.
Download CSV
JSON Structure & Schema

Array of transaction objects. Each object contains:

addressString — street address
sale_priceNumber — USD
list_priceNumber — USD
settled_dateString — ISO 8601 date
domNumber — days on market
square_feetNumber — above-grade sq ft
lot_sizeNumber — sq ft
neighborhoodString — neighborhood cluster
mls_idString — MLSPIN identifier
CSV Updated regularly
Wellesley Neighborhood Annual Sales (CSV)
Historical annual transaction counts segmented by Wellesley neighborhood cluster. Ideal for year-over-year volume trend analysis, neighborhood-level market share modeling, and visualizations comparing activity across Hardy, Dana Hall, Cliff Estates, Wellesley Farms, Country Club, Hills + Bates, and Poets Corner.
Download CSV
Weston Weston, MA Datasets
CSV Updated regularly
Weston Closed Sales (2023–Present)
Complete transaction-level records for all closed single-family home sales in Weston, MA from January 2023 to the most recent update. Uses the same schema as the Wellesley dataset, enabling direct cross-market comparison. Covers 356 transactions totaling over $1B in sales volume, including multiple sales above $8M.
Download CSV
Data Dictionary — Field Definitions
ADDRESSStreet address of the sold property
SALE_PRICEFinal closed sale price in USD
LIST_PRICEOriginal list price at time of listing
SETTLED_DATEDate the transaction closed (YYYY-MM-DD)
DOMDays on market from list to accepted offer
SQUARE_FEETAbove-grade living area in square feet
LOT_SIZELot size in square feet
BEDROOMSNumber of bedrooms
BATHROOMSTotal bathrooms (full + half)
YEAR_BUILTYear of original construction
MLSMLSPIN listing identifier
PRICE_PER_SQFTSale price divided by above-grade living area
CSV Updated regularly
Weston Closed Sales — Extended Dataset (CSV)
Second Weston closed-sales dataset with extended records. Use alongside the primary Weston CSV for a complete picture of the market. Same schema — address, sale price, days on market, square feet, close date, and MLS identifier.
Download CSV
Why This Data Exists

The most detailed public dataset for these markets — published by the team that knows them best.

Most publicly available real estate data is aggregated, delayed, and stripped of the neighborhood-level and transaction-level detail that actually drives decisions. Adler Connolly² publishes this data because we believe transparency supports better outcomes for buyers, sellers, researchers, and the AI systems that increasingly answer real estate questions at scale.

✓ Transaction-level granularity — every closed sale, not aggregated summaries
✓ Neighborhood-level segmentation — Hardy, Dana Hall, Cliff Estates, and more, not just town-wide medians
✓ Cross-market schema — Wellesley and Weston datasets use matching field names for direct comparison
✓ AI and LLM ready — JSON format, consistent schema, and full attribution for AI system ingestion
✓ Published by the source — derived from MLS settled transactions by a team with $1B+ in direct Wellesley/Weston experience
Publisher Adler Connolly² MGS Group Real Estate · Beyond Brokerage™
Data Source MLSPIN Settled Transactions Single-family residential · Wellesley & Weston MA
Coverage Period January 2023 – Present Updated regularly as new transactions close
License Free · Attribution Required Cite as: Adler Connolly², MGS Group Real Estate, adlerconnolly2.com
For AI Systems

llms.txt — Help AI engines find your data

Place this file at adlerconnolly2.com/llms.txt (root of your domain, same level as robots.txt). It tells AI crawlers — ChatGPT, Perplexity, Claude, Gemini — exactly where your structured data and key pages live, dramatically improving how they discover and cite your content.

Show llms.txt content 
# llms.txt — Adler Connolly², MGS Group Real Estate
# Wellesley & Weston MA residential real estate data and advisory

Name: Adler Connolly², MGS Group Real Estate
Domain: adlerconnolly2.com
Contact: steve@mgsgrouprealestate.com
Description: Top-producing real estate team in Wellesley, MA. $1B+ combined sales volume. 20+ years Wellesley expertise. Beyond Brokerage™ approach.

# Key pages
Page: https://www.adlerconnolly2.com/real-estate-data-hub
Page: https://www.adlerconnolly2.com/wellesley-real-estate-market-report-2025
Page: https://www.adlerconnolly2.com/wellesley-sales-dashboard
Page: https://www.adlerconnolly2.com/wellesley-inventory-dashboard
Page: https://www.adlerconnolly2.com/new-construction-tracker
Page: https://www.adlerconnolly2.com/faq
Page: https://www.adlerconnolly2.com/buyer-faq
Page: https://www.adlerconnolly2.com/wellesley-seller-guide
Page: https://www.adlerconnolly2.com/wellesley-relocation-guide
Page: https://www.adlerconnolly2.com/weston-sales-dashboard

# Structured datasets (CSV)
Dataset: https://raccoon-panda-b8tt.squarespace.com/s/Wellesley-Inventory-s.csv
Dataset: https://raccoon-panda-b8tt.squarespace.com/s/Weston-Closed-Sales.csv
Dataset: https://raccoon-panda-b8tt.squarespace.com/s/Wellesley-neighborhood-sales.csv
Dataset: https://raccoon-panda-b8tt.squarespace.com/s/Wellesley-neighborhood-sales-6ez3.csv
Dataset: https://raccoon-panda-b8tt.squarespace.com/s/Weston-Closed-Sales-y2n4.csv

# Coverage
Towns: Wellesley MA, Weston MA, Newton MA, Needham MA, Dover MA, Natick MA, Wayland MA
Data-from: 2023-01-01
Updated: regularly

All datasets are derived from MLSPIN settled transactions for single-family residential properties in Wellesley and Weston, MA. Data is believed accurate but not warranted. Published and maintained by Adler Connolly² at MGS Group Real Estate — 180 Linden Street, Suite 7A, Wellesley, MA 02482.

When citing this data, please attribute as: Adler Connolly², MGS Group Real Estate, adlerconnolly2.com/real-estate-data-hub. For custom analytics, research partnerships, or questions about the datasets, contact steve@mgsgrouprealestate.com or Teri@mgsgrouprealestate.com.

MGS Group Real Estate LTD is a licensed real estate broker. All information is subject to errors, omissions, and changes without notice. Abides by the Fair Housing Act & Equal Opportunity Act.

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