The Boston ArchiveBoston, Massachusetts

Dataset

Property Assessment

Gives property, or parcel, ownership together with value information, which ensures fair assessment of Boston taxable and non-taxable property of all types and classifications. To preserve their integrity, the identifiers PID, CM_ID, GIS_ID, ZIPCODE, and MAIL_ZIPCODE all are marked with an…

Dataset

Publisher
Assessing Department
Spatial coverage
all
Fields
67
Keywords
parcel, property, property value, tax
Publisher's page
https://data.boston.gov/dataset/property-assessment

Artifacts

“Preserved” means the archive holds the bytes and their digest. “Referenced” means it holds the record of them and nothing more. The archive does not claim a holding it cannot prove.

FormatPreservationSizeDigestSource
CSVunavailable80191023—source
CSVunavailable79499599—source
CSVunavailable78312685—source
CSVunavailable75198520—source
CSVunavailable78955927—source
CSVunavailable76057731—source
CSVunavailable58745214—source
CSVpreserved4026820490721287b35a98d9287f7fd4b92aedb92bf7acd52efc40af462506dfd3b5fe43source
CSVunavailable——source
CSVpreserved417863976bd53a1b3d1f9aa062173e67985aa590d8c5b318ab09fa7164140f5a351a31cesource
CSVpreserved45474287b88481a97b08acf784d0877174ce1b1ad856332bc1106a347dea468a50b396fbsource
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
CSVreferenced——source
DOCreferenced——source
DOCreferenced——source
DOCreferenced——source
PDFreferenced55727—source
PDFreferenced169774—source
PDFreferenced169774—source
PDFreferenced169623—source
PDFreferenced169361—source
PDFreferenced166253—source
PDFreferenced67350—source
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Column dictionary

The publisher's own dictionary, preserved verbatim. The archive does not reword a schema into its own vocabulary — how the publisher named a column is evidence about the publisher.

ColumnTypeDescription
PIDtext
CM_IDtext
GIS_IDtext
ST_NUMtext
ST_ALPHAtext
ST_NUM2text
ST_NAMEtext
UNIT_NUMtext
CITYtext
ZIP_CODEtext
BLDG_SEQtext
NUM_BLDGStext
LUCtext
LUtext
LU_DESCtext
BLDG_TYPEtext
OWN_OCCtext
OWNERtext
MAIL_ADDRESSEEtext
MAIL_STREET_ADDRESStext
MAIL_CITYtext
MAIL_STATEtext
MAIL_ZIP_CODEtext
RES_FLOORtext
CD_FLOORtext
RES_UNITStext
COM_UNITStext
RC_UNITStext
LAND_SFtext
GROSS_AREAtext
LIVING_AREAtext
LAND_VALUEtext
BLDG_VALUEtext
SFYI_VALUEtext
TOTAL_VALUEtext
GROSS_TAXtext
YR_BUILTtext
YR_REMODELtext
STRUCTURE_CLASStext
ROOF_STRUCTUREtext
ROOF_COVERtext
INT_WALLtext
EXT_FNISHEDtext
INT_CONDtext
EXT_CONDtext
OVERALL_CONDtext
BED_RMStext
FULL_BTHtext

48 of 67 columns are shown here. The complete dictionary, exactly as the publisher words it, is served as its own holding at /asset/12e822f735f00980ad4ccc0d8574182e/property-assessment-columns.json — 3955 bytes, SHA-256 12e822f735f00980…, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

Questions this record answers

Each answer is composed only from fields this record carries, and names the attestation for what it says. A question the record cannot answer from its own attested content is not asked here. Where a boundary is described as official it was promulgated by an authority with the power to draw it and is not amended by anything on the vernacular layer; where it is described as vernacular it is held by attestation alone and amends no official boundary.

Who publishes Property Assessment, and under what license?

Assessing Department publishes it. The archive accessioned it under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0 (public domain), and holds the publisher's own column dictionary verbatim rather than reworded into the archive's vocabulary — how a publisher names a column is evidence about the publisher.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

What does Property Assessment cover?

In space, all.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

How large is Property Assessment?

67 columns, as the publisher's own catalog reports them.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

Can the archive hand back the bytes of Property Assessment?

Yes, for 3 of 39 distributions. Each preserved artifact is served at its own address with the digest recorded at retrieval emitted in an x-archive-sha256 header, and is handed over as an attachment: preserved material is evidence, not content, and is never rendered on this origin.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

What does the archive hold for Property Assessment, and under what license?

The Boston Archive holds this record of Property Assessment from City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0 (public domain). 3 recorded transforms stand between the retrieved bytes and this record. Attribution is due to City of Boston.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

Identity

Identifier
urn:lemay:boston:dataset:property-assessment
Canonical URL
https://boston.fyi/dataset/property-assessment
As JSON
https://boston.fyi/dataset/property-assessment.json
Version
2 · last changed 13 September 2026

Provenance

Source
City of Boston Open Data Portal (Analyze Boston) — source of record
License
Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0 (public_domain)
Retrieved
2 September 2026
Source identifier
property-assessment
Attribution
City of Boston
Rights as stated
Open Data Commons Public Domain Dedication and License (PDDL)

Transform ladder

#OperationDescriptionTool
1fetchretrieved the dataset's metadata record from the CKAN package_show endpointarchive-ingest 0.1.0
2normalizemapped the portal's catalog fields onto the archive's Dataset record; the publisher's own wording and column dictionary are preserved verbatimarchive-ingest 0.1.0
3externalize-column-dictionaryThe publisher's 67-column dictionary left the inline page graph and became a preserved holding at /asset/12e822f735f00980ad4ccc0d8574182e/property-assessment-columns.json, served verbatim with its own digest. The record's stored field schema is unchanged; the graph now addresses it instead of carrying it.archive-ingest 0.1.0