The story of this market
The typical home in ZIP 06870 sells for about $2,940,000, or $938 per square foot.
Prices are up +4.5% from a year ago, so sellers still have some momentum. Homes take about 32 days to sell. HUD's fair market rent for a two-bedroom is $3,501 a month.
ZIP 06870 — Greenwich
The 06870 housing market remains highly competitive with low inventory and strong price appreciation, driven by high demand for coastal luxury properties. Sales activity has surged compared to the previous year, and homes are selling significantly above list price, reflecting a robust seller's market.
This ZIP is ideal for affluent families and high-earning commuters who prioritize top-tier schools, coastal amenities, and convenient rail access to major employment hubs.
Median prices moved up 4.5% year over year.
Homes spend a median of 32 days on market with 1.0 months of supply — a fast-moving market.
0% of listings have cut prices · homes sell at 107% of asking — demand is running ahead of supply.
no recorded foreclosure-ledger notices (0.0 per 10,000 residents) · unemployment 4.2% · poverty 3.4% — a stable, low-distress profile.
Researched annual trajectory for this ZIP, from published historical series
Solid: researched ten-year history · dotted: 1 / 3 / 5-year projection extended from the historical 9.0%/yr trend — a deterministic estimate, not a published forecast or guarantee.
Median annual property tax paid on this ZIP's residential parcels
Solid: researched ten-year history · dotted: 1 / 3 / 5-year projection extended from the historical 8.9%/yr trend — a deterministic estimate, not a published forecast or guarantee.
versus the prior ACS vintage
in-migration and out-migration balanced
ZCTA 06870, Fairfield County CT
ACS 2024 5-year estimates. Aggregate published statistics for this ZIP — never individual records, and never an attribute of any individual property or resident.
Old Greenwich is widely considered a very safe, low-crime community, consistent with the broader affluent profile of the Greenwich area.
The area is served by highly-rated public schools within the Greenwich Public Schools district, which is consistently recognized for academic excellence.
The ZIP code includes significant coastal frontage along Long Island Sound, resulting in high exposure to flood and storm surge risks that necessitate specialized property insurance.
The area maintains a stable, high-value residential character with limited new large-scale development, focusing instead on luxury custom home builds and renovations.
Composed from the ARED governance burden registry — tier-native tax structure (state + county + city + special districts), never averaged. State (Connecticut) — Municipal Real Property Tax Assessment & Mill Rate Mechanics: Under C.G.S. § 12-62a, all taxable real property is assessed uniformly at a mandatory 70% assessment ratio of its fair market value (FMV). Real property tax is computed annually using the formula: Assessed Value = Fair Market Value × 0.
Residents benefit from the Old Greenwich Metro-North station, providing direct rail access to Stamford and New York City, while major highway access is via I-95.
The area features extensive waterfront access at Greenwich Point Park (Tod's Point), local yacht clubs, and the village-style shopping and dining district along Sound Beach Avenue.
The rental market is characterized by high demand and limited inventory, with luxury single-family homes and high-end apartments commanding premium monthly rates.
The local economy is anchored by proximity to the financial and corporate headquarters in Stamford and the broader Fairfield County professional services sector.
Development is primarily restricted to residential infill and luxury property redevelopment due to the built-out nature of the coastal village.
Parcels are subject to the Greenwich Public Schools district and standard municipal utility districts.
Coastal properties face elevated insurance premiums due to flood and wind hazard exposure in the Long Island Sound region.
Data retrieved from US Census Bureau ZCTA 06870 profiles.
Public schools whose reported address is in this area (NCES). Not attendance boundaries — schools that serve residents may sit outside it. Check the district's address locator for assignment.
A premier coastal park offering beaches, trails, and sailing facilities.
The central village hub featuring boutique shops and local restaurants.
Key-figure check: no independent anchor retained yet — first-researched cycles establish the anchor baseline this pass. Coherence hold-out: this pass's median rent ($13,000) sat outside the 0.25–4× band around Fairfield County's retained level and was not stored.