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CT area data

Old Lyme, CT

Old Lyme, CT.

Population: 9,828 (Census ACS)

The typical home value in Old Lyme, CT is $705,361 — up 11.0% over the past year. Homes sell for a median $647,950 after a median 46 days on market. Typical rent runs $2,725/month. 5 schools serve the area (NCES). Cost of living is 3.6% above the US average (BEA, metro/state-level).

Backed by 25+ public sourcesFEMA · U.S. Census · NOAA · Dept. of Education · EPA · and more

$705,361

Typical home value

+11.0%

1-year change

46

Median days on market

Home values & appreciation

Typical home value
$705,361
1-year appreciation
+11.0%
3-year appreciation
+19.4%
5-year appreciation
+45.8%
10-year appreciation
+99.7%
Peak value since 2000 (Aug 2026)
$705,361
House Price Index (state)
325.3 (+4.6% YoY)

Sources: home value index (ZIP-level) · FHFA House Price Index (state-level)

Market activity

Median sale price
$647,950
Median list price
$685,000
Median price per sqft
$372
1-year sale-price change
-4.0%
Median days on market
46 days
Homes sold (recent period)
42
For-sale inventory
52
Sale-to-list ratio
100.0%
Active listings
40
1-year forecast
+4.8%
Days to pending
28 days
New listings (monthly)
17

Source: recent area sales and market data (ZIP-level)

Rents

Typical rent
$2,725/mo
Studio fair-market rent
$1,346/mo
1BR fair-market rent
$1,543/mo
2BR fair-market rent
$1,933/mo
3BR fair-market rent
$2,303/mo
4BR fair-market rent
$2,542/mo

Sources: market rent index (ZIP-level) · HUD Fair Market Rents (metro/county-level, 40th-percentile regulatory reference)

Affordability

Cost of living index (Above Average)
103.6 (100 = US avg)
Electricity rate (state-level)
29.4¢/kWh
Natural gas rate (state-level)
$16.80/MCF
30-year mortgage rate (national)
7.40%
15-year mortgage rate (national)
6.73%

Sources: BEA Regional Price Parities (metro/state-level) · EIA energy rates (state-level) · Freddie Mac PMMS (national)

Schools

Total schools
5
Elementary schools
2
Middle schools
1
High schools
1
Avg student-teacher ratio
11.2 : 1
Schools include
Center School, Lyme Consolidated School, Lyme-Old Lyme High School, Mile Creek School, Lyme-Old Lyme Middle School

Source: NCES school directory, 2024-25 (school-address-based)

Natural hazards & flood risk

Most common flood zone among NFIP claims
Zone A08
NFIP flood claims on record
388
Radon potential (county)
High radon potential — EPA Zone 1 of 3
EPA Superfund (NPL) sites within 5 mi
None
Nearest Superfund site
New London Submarine Base (12.5 mi)
Flood zones vary by property. Look up a specific address on the FEMA Flood Map Service Center.
EPA recommends radon testing for every home regardless of zone.

Sources: FEMA National Risk Index (county-level) · FEMA NFIP flood-insurance claims (ZIP-level) · USDA Forest Service Wildfire Risk to Communities (county-level) · EPA radon zones + Superfund NPL

Climate (30-year normals)

Average annual temperature
53.0°F
Average high
60.0°F
Average low
46.0°F
Annual precipitation
56.2 in
Annual snowfall
10.7 in
USDA plant hardiness zone
7a (extreme annual low 0 to 5°F)

Sources: NOAA Climate Normals (30-year, nearest-station) · USDA Plant Hardiness Zone Map (2023)

Air quality

Air quality rating
Good
Median AQI (annual)
38
Days with Good air quality
296
Days with Moderate air quality
60
Highest AQI recorded (year)
136

Source: EPA annual air quality index (county-level)

Walkability & transit

Walkability index
8.3 / 20
Transit service frequency
-99,999
Jobs reachable by car (30 min)
20,794
Jobs reachable by transit (45 min)
19,501

Source: EPA Smart Location Database (metropolitan block groups)

Amenities

National parks within ~60 mi
5
Nearest national park
Touro Synagogue National Historic Site (53 mi)
National parks include
Touro Synagogue National Historic Site, Springfield Armory National Historic Site, Roger Williams National Memorial
Airports within 30 mi
27
Nearest airport
Mile Creek Airport (4 mi)
Nearest major airport
Groton New London Airport (GON) (15 mi)
Hospitals in or near this ZIP
26
Hospitals include
ST FRANCIS HOSPITAL & MEDICAL CENTER, DAY KIMBALL HOSPITAL, WATERBURY HOSPITAL
Avg hospital rating (CMS)
3.2 / 5
Best hospital rating nearby (CMS)
5.0 / 5
EV charging stations (within 10 mi)
63
Solar radiation rating
Fair (4.0 kWh/m²/day)

Sources: National Park Service · FAA airport data · CMS hospital data (same ZIP, else within ~40 mi) · DOE/NREL (proximity-based)

Housing stock

Median year housing built
1966
Housing built before 1970
54.7%
Housing built 2000 or later
9.2%
Median annual property tax
$6,438
Mean commute to work
21 min
Households with broadband internet
89.6%

Source: Census ACS 5-year estimates (ZIP-level)

How it compares

Old LymeState medianUS median
Typical home value$705,361$444,911$288,527
Median sale price$647,950$450,000$325,000
Median days on market46 days39 days51 days
Typical rent$2,725/mo$2,248/mo$1,809/mo
Median annual property tax$6,438$6,234$2,006

State and US medians are computed across all US ZIP codes with sufficient public-data coverage, from the same sources as the figures above.

Area data compiled from public government, academic, and industry research feeds. Data sources →

Common questions

What is the typical home value in Old Lyme, CT?
$705,361.
What is the median sale price in Old Lyme, CT?
$647,950.
How long do homes take to sell in Old Lyme, CT?
Median days on market: 46 days.
What is typical rent in Old Lyme, CT?
Typical rent: $2,725/month.
Is Old Lyme, CT in a flood zone?
Flood zones vary by property within Old Lyme, CT. 388 FEMA flood-insurance (NFIP) claims are on record; the most common zone among them is A08. Check a specific address on the FEMA Flood Map Service Center.
What is the radon potential in Old Lyme, CT?
High radon potential — EPA Zone 1 of 3, county-level. EPA recommends testing every home regardless of zone.
Are there Superfund sites near Old Lyme, CT?
No current or proposed National Priorities List sites within 5 miles (EPA).
How many schools serve Old Lyme, CT?
5 schools (2 elementary, 1 middle, 1 high) (NCES, 2024-25).
Is Old Lyme, CT walkable?
Walkability index: 8.3/20 (EPA Smart Location Database).
What is the air quality in Old Lyme, CT?
Good. Median AQI: 38. (EPA AQI).
What is the cost of living in Old Lyme, CT?
Regional Price Parity: 103.6 (100 = US average) (Above Average) (BEA RPP, metro/state-level).

ZIP code for Old Lyme

Listing a home in Old Lyme, CT?

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Data last updated

Most recent source refresh: Oct 2026. See all data sources →

Data compiled by REAIGENT7 — AI listing platform for real estate agents