Grade I listed buildings in the borough of Halton, in the ceremonial county of Cheshire.
Grade I listed buildings in Hyndburn
Grade I listed buildings in the Borough of Hyndburn, in Lancashire.
Grade I listed buildings in Lancashire
Grade I listed buildings in the ceremonial county of Lancashire, split into the fourteen authorities making up the county.
Grade I listed buildings in Lancaster
Grade I listed buildings in the Borough of Lancaster, in Lancashire.
Grade I listed buildings in Manchester
Grade I listed buildings in the Metropolitan Borough of Manchester, in Greater Manchester.
Grade I listed buildings in Pendle
Grade I listed buildings in the Borough of Pendle, in Lancashire.
Grade I listed buildings in Preston
Grade I listed buildings in the Borough of Preston, in Lancashire.
Grade I listed buildings in Ribble Valley
Grade I listed buildings in the Borough of Ribble Valley, in Lancashire.
Grade I listed buildings in Rochdale
Grade I listed buildings in the Metropolitan Borough of Rochdale, in Greater Manchester.
Grade I listed buildings in Salford
Grade I listed buildings in the Metropolitan Borough of Salford, in Greater Manchester.