400 NO BEACON ST
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Location
400 NO BEACON ST
Mblu
1301/ 1/ 1400N/ /
Acct#
12476
Owner
ARE-MA REGION NO. 75 LLC
Total Market Value
$6,786,600
PID
12476
Building Count
1
Current Value
Assessment
Valuation YearImprovementsLandTotal
2026$6,786,600$0$6,786,600

Owner of Record
OwnerARE-MA REGION NO. 75 LLC
Co-OwnerC/O ALEXANDRIA REAL ESTATE
AddressPO BOX 847
CARLSBAD, CA 92018
Sale Price$525,500,000
Certificate
Book & Page 73848/56
Sale Date12/18/2019
Instrument1O

Ownership History
Ownership History
OwnerSale PriceCertificateBook & PageInstrumentSale Date
ARE-MA REGION NO. 75 LLC $525,500,000 73848/561O12/18/2019
ATHENA ARSENAL LLC $168,500,000 61782/351U05/13/2013
HARVARD UNIVERSITY $162,641,904 32863/5261D05/15/2001
CHARLES RIVER BUS CTR ASSOC. $20,100,00029502/09229502/0921O12/10/1998
UNITED STATES OF AMERICA$7,500,00029012/42229012/4221E08/25/1998

Building Information
Building 1 : Section 1
Year Built: 1862
Living Area: 22,072
Replacement Cost: $6,196,362
Building Percent Good: 95
Replacement Cost
Less Depreciation:
$5,886,500
Building Attributes
FieldDescription
StyleOffice Bldg
ModelCommercial
GradeVery Good
Stories1
Exterior Wall 1Brick
Exterior Wall 2 
Roof StructureGable
Roof CoverMetal
Int Wall 1Drywall
Int Wall 2 
Int Floor 1Concrete
Int Floor 2 
Heat FuelGas
Heat TypeForced H/A
AC Percent100
Full Baths0
Half Baths4
FrameSteel
Plumbing 
Wall Height24.00
Fireplace(s)0
Fireplace RatingAverage
Kitchen RatingNone
% Sprinkler100
Half Bath RatingGood
Living Units1
Full Bath RatingNone
Kitchens0
Bsmt Garage0
FoundationSlab
Building Photo Building Photo
Building Layout Building Layout
Building Sub-Areas (sq ft)
CodeDescriptionGross
Area		Living
Area
BASBase Floor 11,036 11,036
FUSFinished Upper Story 11,036 11,036
   22,072 22,072

Extra Features
Extra Features
CodeDescriptionSizeValueBldg #
ELV1Pass Elev 1-3stop3.00 UNITS$229,4001

Land
Land Use
Use Code404C
DescriptionR+D BLD  
Zone
NeighborhoodCE
Alt Land ApprNo
Category
Land Line Valuation
Size (Acres)0
Frontage
Depth
Total Market Land$0

Outbuildings
Outbuildings
CodeDescriptionSub CodeSub DescriptionSizeValueBldg #
PAV1Paving-Asphalt  73500.00 S.F$270,5001
LT2W/Double Light  1.00 UNITS$15,5001
LT1Lights-In W/Pl  1.00 UNITS$18,6001
PAV1Paving-Asphalt  12450.00 S.F$45,8001
LT2W/Double Light  1.00 UNITS$1,7001
LT1Lights-In W/Pl  2.00 UNITS$2,1001
PAV1Paving-Asphalt  6795.00 S.F$25,0001
LT2W/Double Light  1.00 UNITS$1,7001
LT1Lights-In W/Pl  2.00 UNITS$2,1001
PAV1Paving-Asphalt  8505.00 S.F$31,3001
LT2W/Double Light  1.00 UNITS$1,7001
LT1Lights-In W/Pl  2.00 UNITS$2,1001
PAV1Paving-Asphalt  6515.00 S.F$24,0001
LT2W/Double Light  1.00 UNITS$1,7001
LT1Lights-In W/Pl  2.00 UNITS$2,1001
PAV1Paving-Asphalt  22800.00 S.F$83,9001
LT2W/Double Light  3.00 UNITS$5,2001
LT1Lights-In W/Pl  6.00 UNITS$6,2001
PAV1Paving-Asphalt  9450.00 S.F$34,8001
LT2W/Double Light  1.00 UNITS$1,7001
LT1Lights-In W/Pl  2.00 UNITS$2,1001
PAV1Paving-Asphalt  2040.00 S.F$7,5001
LT2W/Double Light  1.00 UNITS$1,7001
LT1Lights-In W/Pl  2.00 UNITS$2,1001
PAV1Paving-Asphalt  945.00 S.F$3,5001
LT2W/Double Light  1.00 UNITS$1,7001
LT1Lights-In W/Pl  1.00 UNITS$1,0001
PAV1Paving-Asphalt  450.00 S.F$1,7001
LT1Lights-In W/Pl  1.00 UNITS$1,0001
PAV1Paving-Asphalt  4050.00 S.F$14,9001
LT2W/Double Light  1.00 UNITS$1,7001
LT1Lights-In W/Pl  2.00 UNITS$2,1001
Valuation History
Assessment
Valuation YearImprovementsLandTotal
2025$398,835,500$134,308,400$533,143,900
2024$407,715,992$92,626,500$500,576,992
2023$337,262,900$67,724,000$405,221,400

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