Wellesley New
Construction
Tracker
Every active new build, teardown lot, and upcoming spec home in Wellesley — including properties that never reach the public MLS. Built from permits, builder relationships, and on-the-ground monitoring. Updated continuously by the team that knows this market best.
Active New Construction Sites
Click any pin for the address, zoning district, and a direct link to discuss the opportunity. Filter by zoning district to focus on what matches your budget and goals.
Map reflects known active sites as of September 29, 2026. New permits and builder relationships are added continuously.
Conforming House Size by Zoning District
Wellesley's TLAG (Total Living Area & Garage) formula determines the maximum buildable square footage on any given lot. The district your teardown sits in directly determines what a builder can construct — and therefore what you can buy. Knowing which zone a site is in before you make an offer is essential.
TLAG = Total Living Area & Garage. The figures above are Large House Review thresholds, not hard caps: a larger home can be built, but it must go through Large House Review and be approved by the Planning Board before a building permit is issued (Zoning Bylaw Section 5.9). The calculation is more nuanced than square footage alone — it factors in finished basement space, garage area, and accessory structures. Always verify with a builder before making assumptions about what can be built on a specific lot. The official Town of Wellesley TLAG worksheet is available at wellesleyma.gov. Our team can walk you through any specific site's buildable envelope before you commit.
Built from the ground up — not scraped from MLS.
Most new construction searches surface the same public inventory every other buyer is already tracking. This map is different. It is built and maintained by Adler Connolly² at MGS Group Real Estate — a team that actively monitors Wellesley's building pipeline through four primary sources, not listing feeds.
Buying new construction and off-market homes in Wellesley
How can I find off-market new construction homes in Wellesley, MA?
Most new construction in Wellesley is identified before it is publicly listed: through building permit applications, Zoning Board of Appeals and Large House Review filings, and direct relationships with local builders. This tracker maps 50+ active sites, including pre-permit and off-market projects, and our team can tell you about sites that are not on the map yet.
How much does new construction cost in Wellesley?
Pricing follows the zoning district, because the district sets how large a home can be built without Large House Review. As a general guide: SR10 roughly $2.5M–$3.5M, SR15 $3M–$4.5M, SR20 $4M–$6M, and SR30/SR40 estate lots $5M–$10M+. Lot, location, builder and finish level move any individual home within or beyond these ranges.
What is TLAG and Large House Review in Wellesley?
TLAG (Total Living Area plus Garage) is how Wellesley measures house size. When a proposed home's TLAG exceeds the threshold for its district — 3,600 SF in SR10, 4,300 SF in SR15, 5,900 SF in SR20, and 7,200 SF in SR30 and SR40 — it must go through Large House Review and be approved by the Planning Board before a building permit is issued (Zoning Bylaw Section 5.9).
Can buyers customize a new construction home in Wellesley?
Often, if you get involved early. Buyers who connect with a builder before or during permitting can frequently influence the floor plan and finish selections. Once a spec home is framed and close to listing, options narrow — which is why early access through permits and builder relationships matters.
Interested in a specific site?
Every pin on this map represents a real conversation we can have — about the builder, the lot, the zoning envelope, and whether it's worth pursuing. We can also tell you about sites that aren't on this map yet.