18 William St, Darien, CT 06820 Property Records

Darien Town property record for 18 William St, Darien, CT 06820

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 888 sqft · built 1916
Lot Size	0.09 acres (3,920 sqft)
Owner	Individual Name on Record
Last Sale	$605,000 (Jun 2021)
Tax Bill	$6,737 (2025)
Deeds & Mortgages	Jun 2021 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`DARI M:23 B:49`

Property Details

APN / Parcel Number

Primary APN	`DARI M:23 B:49`
Alternative APN	`5264`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Half Baths	1 Half Bath
Total Rooms	4 Rooms
Stories	1 Story
Building Area	888 sqft Living Area
1st Floor Area	888 sqft
Basement Area	416 sqft
Unfinished Basement	416 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1916
Effective Year Built	Effective 1916
Architectural Style	Other
Exterior Material	Aluminum/Vinyl
Roof Type	Gable
Roof Material	Asphalt
Lot Area	3,920 sqft (0.09 acres)

Utilities, Heating & Cooling

Heating System	Hot Water
Heating Fuel	Oil

Location & Zoning

Account Number	5264
Street Address	18 WILLIAM ST
City	DARIEN
State	CT
Zip	06820-4028
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R15
Legal Block	49
Jurisdiction	DARIEN CT
Township / Civil Division	DARIEN
Census Block Group	1
Census Block	1012
Census Tract	30500

Owner

Source: Darien Town records, as of June 25, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Individual Name on Record
Mailing Address	18 WILLIAM ST, DARIEN, CT 06820-4028
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jun 10, 2021 · Amount on Record
Deed Sale	Jun 10, 2021 · Amount on Record
Prior Sale	Oct 17, 2008 · Amount on Record
Deed Book / Page	1720 / 329
Record Updated	Oct 29, 2026

June 2021: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	DARIEN CT
Recording Date	Jun 10, 2021
Property Address	18 WILLIAM ST, DARIEN, CT 06820-4028
Document Number	001720-329
Book / Page	1720 / 329
Instrument Date	Jun 9, 2021
Transaction Type	Transfer
Record Updated	Jan 17, 2022

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2200 N CENTRAL RD APT 1F, 1F, FORT LEE, NJ 07024-7548

Mortgage

Document Number	0001720332
Date	Jun 10, 2021
Instrument	1720/332

Lender

Name	JPMORGAN CHASE BANK NA
Type	Bank

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount Recorded

Tax Assessment & Valuation

Source: Darien Town assessment roll, as of June 25, 2026

Property Jurisdictions

Type	Name
State	Connecticut
County Subdivision	Darien Town
Unified School District	Darien School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$6,737.00	$435,190 (+14.54%) Land $336,630 Building $98,560	$304,633 Land $235,641 Building $68,992
2024	$6,737.00 (+0.69%)
2023	$6,691.00 (+2.2%)	$379,960 (-) Land $320,600 Building $59,360
2022	$6,547.00	$379,960 Land $320,600 Building $59,360

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective November 28, 2025

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 80% of the US · above 55% of Connecticut
Wildfire Likelihood	0.01% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	AQUARION-EASTERN FAIRFIELD COUNTY private · serves 351,756 people · EPA ID CT0150011
Water Source	Surface water
Last State Inspection	Jun 2025
Lead	Under 1 ppb (2026) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	24 last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 333 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Optimum Fiber · Cable	8,000 / 8,000
Frontier Fiber	7,000 / 7,000
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless	100 / 20

May also be available: T-Mobile.

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