{"id": "n-eba6eaeb34", "slug": "hatfield-hatfield-aerodrome", "type": "other", "name": "Hatfield Aerodrome", "aka": [], "city": "Hatfield", "county": null, "state": null, "country": "England", "census_division": null, "lat": 51.76583333, "lon": -0.25083333, "geocode_method": "wikipedia", "address": null, "metro": null, "original_use": "airport", "year_opened": 1930, "year_closed": 1994, "acres": null, "gla_sqft": null, "stores_peak": null, "levels": null, "original_developer": "de Havilland Aircraft Company", "original_architect": null, "before_notes": "Draft from Wikipedia, model-extracted, unreviewed: Hatfield Aerodrome, a former private airfield and aircraft factory in Hatfield, Hertfordshire, England, closed in 1994 and was redeveloped in the late 1990s into a mixed-use site including a university campus, housing, a business park, and a leisure centre.", "strategy": ["redevelop", "reinhabit"], "new_use": ["education", "entertainment", "housing", "mixed", "office", "retail"], "share_retrofit": null, "status": "built", "year_retrofit": 1990, "developer": "Arlington Securities", "architect": null, "after_notes": "Today the flight test hangar survives as a leisure centre, whilst the rest of the site is divided between the University of Hertfordshire, housing and a business park.", "narrative": "Hatfield Aerodrome (IATA: HTF, ICAO: EGTH) was a private airfield and aircraft factory located in the English town of Hatfield in Hertfordshire from 1930 until its closure and redevelopment in the 1990s.\n\n\n== Early history ==\nGeoffrey de Havilland, pioneering aircraft designer and founder of the de Havilland Aircraft Company purchased some farmland close to Hatfield as his existing site at Stag Lane, Edgware was being encroached upon by expanding housing developments in the London suburbs.", "narrative_license": "CC BY-SA 4.0", "narrative_source": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "zoning_change": null, "public_subsidy": null, "entitlement_year": null, "planning_notes": null, "wikidata_qid": "Q3887282", "wikipedia": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "osm_id": null, "verified": "draft", "verified_by": null, "last_verified": null, "last_updated": "2026-10-18", "created": "2026-10-18", "contributor_name": null, "contributor_org": null, "contributor_link": null, "international": 1, "county_fips": null, "opp_score": null, "opp_reasons": null, "for_sale": 0, "distressed": 0, "url": "https://retrofitatlas.org/other/england/hatfield-hatfield-aerodrome/", "events": [{"year": 1930, "date": null, "kind": "note", "detail": "Flying commenced", "source_id": 7582}, {"year": 1930, "date": null, "kind": "opened", "detail": "Opened", "source_id": null}, {"year": 1990, "date": null, "kind": "note", "detail": "Redevelopment began", "source_id": 7586}, {"year": 1990, "date": null, "kind": "retrofit", "detail": "Retrofit: redevelop, reinhabit", "source_id": null}, {"year": 1991, "date": null, "kind": "note", "detail": "Bishop Square office block development constructed", "source_id": 7583}, {"year": 1992, "date": null, "kind": "note", "detail": "British Aerospace announced cessation of aircraft production", "source_id": 7584}, {"year": 1994, "date": null, "kind": "note", "detail": "Airfield closed", "source_id": 7585}, {"year": 1994, "date": null, "kind": "closed", "detail": "Closed", "source_id": null}, {"year": 2010, "date": null, "kind": "note", "detail": "Hatfield Aerodrome History Trail officially opened", "source_id": 7587}], "sources": [{"id": 7581, "site_id": "n-eba6eaeb34", "url": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "title": "Hatfield Aerodrome", "publisher": "Wikipedia", "date": null, "quote": "Hatfield Aerodrome", "kind": "wikipedia", "license": "CC BY-SA 4.0", "retrieved": "2026-10-18"}, {"id": 7582, "site_id": "n-eba6eaeb34", "url": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "title": "Timeline", "publisher": null, "date": null, "quote": "Flying commenced in 1930", "kind": "quote", "license": null, "retrieved": "2026-10-18"}, {"id": 7583, "site_id": "n-eba6eaeb34", "url": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "title": "Timeline", "publisher": null, "date": null, "quote": "Bishop Square office block development, constructed in 1991", "kind": "quote", "license": null, "retrieved": "2026-10-18"}, {"id": 7584, "site_id": "n-eba6eaeb34", "url": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "title": "Timeline", "publisher": null, "date": null, "quote": "In 1992, due to severe financial problems, British Aerospace announced the cessation of aircraft production at Hatfield from 1993.", "kind": "quote", "license": null, "retrieved": "2026-10-18"}, {"id": 7585, "site_id": "n-eba6eaeb34", "url": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "title": "Timeline", "publisher": null, "date": null, "quote": "Friday 8 April 1994 was Hatfield's last day as an airfield", "kind": "quote", "license": null, "retrieved": "2026-10-18"}, {"id": 7586, "site_id": "n-eba6eaeb34", "url": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "title": "Timeline", "publisher": null, "date": null, "quote": "Arlington Securities, then the property division of BAE Systems, began the redevelopment of the main airfield site in the late 1990s.", "kind": "quote", "license": null, "retrieved": "2026-10-18"}, {"id": 7587, "site_id": "n-eba6eaeb34", "url": "https://en.wikipedia.org/wiki/Hatfield_Aerodrome", "title": "Timeline", "publisher": null, "date": null, "quote": "The Hatfield Aerodrome History Trail was officially opened on 24 November 2010.", "kind": "quote", "license": null, "retrieved": "2026-10-18"}], "deals": [], "parties": [{"name": "Arlington Securities", "kind": "developer", "role": "developer", "year_from": 1990, "year_to": null}], "parcels": [], "context": {"assessment": {"what_happened": "Hatfield Aerodrome (1930–1994) closed as an airport and was redeveloped starting in 1990. The site is now divided between the University of Hertfordshire, housing, and a business park. The original flight test hangar survives as a leisure centre. The retrofit strategy was \"redevelop, reinhabit\". The developer was Arlington Securities (1990–present).", "why": "The site was an airport (not a mall) with original use as an aircraft factory. Current uses match the listed new_use categories. The hangar's survival as a leisure centre is explicitly noted in after_notes. No details on housing numbers, business park tenants, or exact university land allocation are provided.", "where_it_stands": "Status: built. The retrofit is complete. The site is not a mall. The 1990 retrofit year aligns with the closure year (1994).", "for_a_planner": ["Site is mixed-use (education, housing, office, retail, entertainment) with confirmed university and housing components. Hangar preservation noted."], "for_a_developer": ["Current uses include university, housing, business park. No tenant or financial details provided. Retrofit completed in 1990s. Unknown: exact land allocation, current retail/entertainment occupancy, or business park tenant mix."], "risks_and_unknowns": ["No data on current retail/entertainment viability. No details on housing density or business park performance. No post-2010 development updates beyond the history trail (2010)."], "data_quality": "partial", "one_line": "Airport closed 1994; redeveloped 1990s into university, housing, business park, with hangar as leisure centre.", "model": "qwen3-30b-a3b-64k:latest", "machine": "Dell 5820 RTX 3090 (Ollama, qwen3-30b-a3b)", "record_sha1": "5eb8958d1c36"}, "cluster": {"within_10km": [{"id": "n-7a16ccafa7", "name": "Panshanger Aerodrome", "city": "Welwyn Garden City", "status": "approved", "km": 7.5}], "count_10km": 1, "count_25km": 8}, "peers": {"peers": [{"id": "n-4d791ab853", "name": "Camarillo State Mental Hospital", "city": "Camarillo", "state": "CA", "score": 7.0, "why": ["opened 1936", "closed 1996", "same strategy: redevelop, reinhabit"]}, {"id": "n-2e8a724f11", "name": "Stapleton International Airport", "city": "Denver", "state": "CO", "score": 7.0, "why": ["opened 1929", "closed 1995", "same strategy: redevelop"]}, {"id": "n-f3a123ae9d", "name": "Brewery", "city": "Romford", "state": null, "score": 6.5, "why": ["closed 1993", "same strategy: redevelop", "36 km away"]}, {"id": "n-a760c1fd76", "name": "Wembley Stadium", "city": "Wembley", "state": null, "score": 6.0, "why": ["opened 1923", "same strategy: redevelop", "24 km away"]}, {"id": "m-e594aa16bf", "name": "100 Oaks Mall", "city": "Nashville", "state": "TN", "score": 5.5, "why": ["closed 1991", "same strategy: reinhabit"]}, {"id": "m-a767e4129f", "name": "East Lake Square Mall", "city": "Tampa", "state": "FL", "score": 5.5, "why": ["closed 1998", "same strategy: reinhabit"]}], "method": "size, era, strategy, status, type, state, distance"}}, "elements": [{"slug": "strategy-reinhabit", "name": "Reinhabited", "group_": "strategy", "evidence": "Today the flight test hangar survives as a leisure centre, whilst the rest of the site is divided between the University of Hertfordshire, housing and a business park.", "origin": "record"}, {"slug": "use-office", "name": "Office", "group_": "use", "evidence": "new_use field", "origin": "newtypes-extraction"}, {"slug": "use-retail", "name": "Retail (continued)", "group_": "use", "evidence": "new_use field", "origin": "newtypes-extraction"}, {"slug": "era-closed-1990s", "name": "Closed 1990s", "group_": "era", "evidence": "1994", "origin": "newtypes-extraction"}, {"slug": "strategy-redevelop", "name": "Redeveloped", "group_": "strategy", "evidence": "Today the flight test hangar survives as a leisure centre, whilst the rest of the site is divided between the University of Hertfordshire, housing and a business park.", "origin": "record"}, {"slug": "use-housing", "name": "Housing", "group_": "use", "evidence": "he site is divided between the University of Hertfordshire, housing and a business park.", "origin": "newtypes-extraction"}, {"slug": "use-education", "name": "Education", "group_": "use", "evidence": " centre, whilst the rest of the site is divided between the University of Hertfordshire, housing and a business park.", "origin": "newtypes-extraction"}, {"slug": "use-park", "name": "Park and open space", "group_": "use", "evidence": "een the University of Hertfordshire, housing and a business park.", "origin": "newtypes-extraction"}, {"slug": "use-mixed", "name": "Mixed use", "group_": "use", "evidence": "new_use field", "origin": "newtypes-extraction"}, {"slug": "era-retrofit-1990s", "name": "Retrofit 1990s", "group_": "era", "evidence": "1990", "origin": "newtypes-extraction"}, {"slug": "use-entertainment", "name": "Entertainment and sports", "group_": "use", "evidence": "new_use field", "origin": "newtypes-extraction"}, {"slug": "era-opened-1930s", "name": "Opened 1930s", "group_": "era", "evidence": "1930", "origin": "newtypes-extraction"}], "details": {}, "photos": [], "provenance": {"year_opened": "newtypes-extraction", "year_closed": "newtypes-extraction", "original_developer": "newtypes-extraction", "status": "newtypes-extraction", "after_notes": "newtypes-extraction", "year_retrofit": "newtypes-extraction", "developer": "newtypes-extraction"}, "restricted_fields": {"parcels": ["owner_addr", "assessed", "taxable", "tax_amount", "sale_price", "deed_ref"], "deals": ["price", "price_per_acre", "price_per_sqft", "loan_amount", "asking_price"], "how": "free API key: POST /api/v1/keys {\"email\": …}"}}