Oregon Historical County Records Guide
Washington County Records Inventory
Land Subdivision Records
1850-[ongoing]
Series documents the subdividing and partitioning of land within the county. Records include survey notes, correspondence, photographs, satisfaction of agreements, maps of subdivided and partitioned land, and contracts and permits. Information includes subdivision names; lot, street, and alley dimensions; and township, range, and section numbers of land to be subdivided or partitioned.
The searchable iSpirits research tool includes images of subdivision, partition, and condominium plats. Land Use Planning Division Land Use Files that are available as imaged documents in the office are also stored as security microfilm at the Security Copy Depository in Salem.
Records at the Oregon State Archives:
Fairgrounds Plat, 1868 (.05 cu.ft.);
Gaston Plat, 1889 (.05 cu.ft.).
Records at the Walnut Street Center Complex, Building E, County Historical Records Vault:
Condo Book [Record of Condominiums], vol. 1-7, 1973-1987 (7 volumes);
Copies of Plats [Subdivision], vol. 1-2, ca.1860-ca.1908 (2 volumes);
Index to Town Plats and Cemetery Plats [indexes vol. 1-8], ca.1860-n.d. (1 volume);
Index to Town Plats and Cemetery Plats [indexes vol. 1-21], vol. 1, ca.1860-n.d. (1 volume);
Record of Town Plats, vol. 4-8, ca.1910-ca.1936 (5 volumes);
[Subdivision Plats-alphabetical], ca.1860-ca.1916 (4 volumes);
[Subdivision Plats-copies in paper covers], vol. 3-6, 1909-1913 (4 volumes).
Records at the Walnut Street Center Complex, Building E, County Records Center, Map Cabinet Area:
Partition Plat, 1990-2006 (ca.670 plats);
Plat Book Record of Town Plats [Subdivision], vol. 9-42, 1937-1978 (34 volumes);
Plats Condominium, vol. 8-20, 1987-2003 (4 cu.ft.); 2003-present (3.50 cu.ft.);
Plats Subdivision, 2004-present (4 cu.ft.);
Plat [Subdivision], vol. 43-141, 1978-2004 (ca.1510 plats).
Records at the Public Services Building, Suite 200, Survey Division Main Office:
Part [Partition Plats], 1990-2004 (3 inches of microfiche);
Subdivisions [Plats-alphabetical arrangement], ca.1860-2004 (30 inches of microfiche);
VAC [Road and Subdivision Vacations and Dedications], ca.1950-2004 (6 inches of microfiche).
Records at the Public Services Building, Suite 200, Survey Division Public Research Area:
Section Maps [indexes subdivisions, condominiums, partitions, dedications, vacations, city limit boundaries, and county road numbers], ca.1990-present (ca.6 cu.ft.).
Records at the Public Services Building, Suite 200, Survey Division Vault:
Condominium [Plats], 1973-present (5 cu.ft.);
Partition Plats, 1990-present (10 cu.ft.);
Plats [Record of Town Plats-Subdivision], vol. 2-3, 1893-1910 (2 volumes);
Record of Town Plats [Subdivision], vol. 1, ca.1860-1893 (1 volume);
Subdivision Plats [Surveyor's Copy], ca.1860-present (48 cu.ft.).
Records at the Public Services Building, Suite 350, Land Development Division Office, Microfilm Alcove:
Land Use Files [Case Files-includes subdivision and partition actions], 1959-1972 (31 reels of microfilm); 1973-1994 (80 inches of microfiche);
Land Use Files [Subdivision], 1950-1969 (1 reel of microfilm).
Records at the Public Services Building, Suite 350, Land Development Division Office:
[Land Use Files-Case Files-includes subdivision and partition actions], 2002-present (265 cu.ft.).
Records at the Public Services Building, Suite 130, Public Research Area:
[Plat Book-Subdivision], vol. 1-31, ca.1860-1972 (3 reels of microfilm).
Records at the Washington County Historical Museum:
Cities [Subdivision and Town Plats], n.d.-ca.1945 (1 volume);
[Miscellaneous Maps and Plans-includes land claim, Sanborn insurance, topographical, transportation, vicinity, subdivision, and other topics], ca.1850-ca.1985 (ca.1500 maps);
Subdivisions A-C [Plats-alphabetical arrangement], ca.1860-ca.1958 (1 volume);
Subdivisions D-K [Plats-alphabetical arrangement], ca.1860-ca.1958 (1 volume);
Subdivisions L-R [Plats-alphabetical arrangement], ca.1860-ca.1958 (1 volume);
Subdivisions S-Z [Plats-alphabetical arrangement], ca.1860-ca.1958 (1 volume).
Records at the Washington County Web Site:
County Code [includes land division information], n.d.-present (Internet);
