Changes in version 0.1.0 (2026-04-21)                  

  - Initial CRAN release.

Land Registry

  - ukh_hpi() fetches UK House Price Index data for 441+ regions
    (countries, English regions, counties, local authorities) from 1995
    onwards. Includes average prices, index values, percentage changes,
    sales volumes, and breakdowns by property type and buyer type.
  - ukh_hpi_compare() fetches one measure across multiple regions in a
    wide data frame.
  - ukh_transactions() returns monthly transaction volumes for a region
    (extracts the sales_volume series from ukh_hpi(), noting the
    ~5-month lag).
  - ukh_ppd() fetches individual property transactions from Price Paid
    Data, filtered by local authority, postcode, property type, tenure,
    new-build status, and date range.
  - ukh_ppd_bulk() downloads yearly or complete Price Paid CSVs, with
    automatic fallback to split part files for larger years.
  - ukh_ppd_summary() returns aggregated statistics (counts, median and
    mean prices) by month, property type, or local authority.
  - ukh_ppd_years() fetches PPD across multiple years in one call and
    row-binds.
  - ukh_ppd_transaction() looks up a single transaction by its GUID via
    the Land Registry linked-data REST API.
  - ukh_ppd_address() looks up transactions by postcode via the address
    lookup endpoint, avoiding the full yearly download.

Energy Performance Certificates (MHCLG)

  - ukh_epc_set_key() stores EPC API credentials for the session.
  - ukh_epc_search() queries certificates with filters (postcode, local
    authority, property type, energy rating, built form, date range).
    Pagination handled automatically via search-after tokens. Supports
    type = "domestic" (default), "non-domestic", and "display".
  - ukh_epc_certificate() fetches a single certificate with all 90+
    fields plus improvement recommendations.
  - ukh_epc_summary() returns the distribution of energy ratings (A-G)
    for a local authority.
  - ukh_epc_bulk() downloads and extracts the per-LA bulk ZIP.
  - ukh_epc_recommendations_summary() aggregates improvement
    recommendations across a local authority.

Planning data (Digital Land)

  - ukh_planning() queries planning.data.gov.uk for brownfield land,
    planning applications, local plans, conservation areas, listed
    buildings, and more. Supports format = "sf" to return simple
    features for GeoJSON-capable datasets (requires the sf package,
    declared in Suggests).
  - ukh_planning_datasets() lists all 100+ available datasets.

ONS

  - ukh_pipr() fetches the ONS Price Index of Private Rents (monthly, UK
    and regional, from January 2015) via the ONS Beta API.

Advanced

  - ukh_sparql() runs an arbitrary SPARQL query against the Land
    Registry endpoint (HPI + PPD) or the Open Data Communities endpoint
    (300+ MHCLG housing-market datasets).

Helpers

  - ukh_regions() returns a lookup table of common UK HPI region slugs
    with their names, GSS codes, and tier.
  - ukh_clear_cache() empties the local download cache.
  - ukh_cache_info() reports what is cached and how much space it uses.