The Assessor’s office is responsible for the maintenance of records on the ownership of properties. Assessments are computed at 70% of the estimated market value of real property at the time of the last revaluation which was 2023.
Information on the Property Records for the Municipality of New Canaan was last updated on 1/8/2026.
Property Summary Information
Parcel Data And Values
Building
Building 1
Sales
Permits
Parcel Information
Location:
47 OLD NORWALK RD
Property Use:
Residential
Primary Use:
Residential
Unique ID:
12974
Map Block Lot:
37 88 92
Acres:
0.6000
490 Acres:
0.00
Zone:
ARES
Volume / Page:
1101/ 694
Developers Map / Lot:
917, 6931
Census:
00353
Value Information
Appraised Value
Assessed Value
Land
776,000
543,200
Buildings
814,100
569,870
Detached Outbuildings
0
0
Total
1,590,100
1,113,070
Owner's Information
Owner's Data
COSTIGAN JOSEPH W
COSTIGAN ALYSON
47 OLD NORWALK RD
NEW CANAAN, CT 06840
Building 1
Building Use:
Single Family
Style:
Colonial
Living Area:
3,446
Stories:
2.00
Construction:
Wood Frame
Year Built:
1997
Total Rooms:
9
Bedrooms:
4
Full Baths:
2
Half Baths:
1
Fireplaces:
0
Heating:
Forced Hot Air
Fuel:
Typical
Cooling Percent:
100
Basement Area:
1,674
Basement Finished Area:
0
Basement Garages:
0
Roof Material:
Asphalt
Siding:
Clapboards
Units:
Special Features
Fin Bsmt
1400
Fireplace
1
Gross Basement Area
1674
Attached Components
Type:
Year Built:
Area:
Cathedral
1997
150
Cathedral
1997
256
Wood Deck
1997
534
Frame Garage
1997
528
Open Porch
1997
65
Utility Storage
1997
108
Detached Outbuildings
Owner History - Sales
Owner Name
Volume
Page
Sale Date
Deed Type
Sale Price
COSTIGAN JOSEPH W
1101
0694
06/25/2025
War Surv
$2,175,000
MCCARTHY PATRICK E
0692
0499
07/07/2004
Warranty Deed
$1,307,500
MYER CHRISTHOPHER E
0669
0261
12/03/2003
Warranty Deed
$1,203,000
BUCK GEORGE R
0483
0988
01/27/1998
Warranty Deed
$782,000
ROSEY HOMES LTD
0469
0790
04/18/1997
Quit Claim
$0
LEVY MARK
0469
0788
04/18/1997
Warranty Deed
$117,150
LEVY MARK
0469
0786
04/18/1997
Executors Deed
$497,850
Building Permits
Permit Number
Permit Type
Date Opened
Reason
19473
Residential
05/06/1999
FINISH BASEMENT
1898-0092
Deck
06/09/1998
DECK AND PORTICO
1851-0092
Residential
07/31/1997
DWELLING
GIS Map
Google Map
Unique Id:
Location:
MBL:
Primary Use:
Zone:
Acres:
Appraised Value:
Assessed Value:
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