| Postcode | HP27 9FW | 
|---|---|
| Post Town | Princes Risborough | 
| Nearest station | Monks Risborough (2 km) | 
| Bus stops | Sportsmans Garage (SE) Chestnut Way (SE) Chestnut Way (NW) | 
| Roads in this postcode | |
| Number of UPRNs | 14 View | 
| Known addresses | 5 Lammas Close, Longwick 6 Lammas Close, Longwick 7 Lammas Close, Longwick 8 Lammas Close, Longwick 9 Lammas Close, Longwick | 
| Main property type | Detached | 
| Businesses | 
| Latitude | 51.734109 | |
|---|---|---|
| Longitude | -0.851003 | |
| Easting | 479444 | |
| Northing | 204558 | |
| Grid reference | SP794045 | |
| UTM reference | 30U 648394 5733651 | |
| what3words | like.primary.seatbelt | |
| FixPhrase | crinkly machinist sitcom tipper | |
| Plus code | 9C3XP4MX+JH | |
| Altitude | 101 metres (331 feet) | |
| Sunrise (today) | 6:56 | |
| Sunset (today) | 16:39 | |
| Distance away | ||
| Distance to sea | 92.5 KMs (57.5 miles) | 
| Parish | Longwick-cum-Ilmer | E04001609 | 
|---|---|---|
| Ward | Princes Risborough | E05015964 | 
| Unitary Authority | Buckinghamshire | E06000060 | 
| County | Buckinghamshire | E10000002 | 
| Constituency (2024) | Mid Buckinghamshire | E14001360 | 
| MP | Greg Smith | Conservative | 
| Police force | Thames Valley | |
| NUTS/ITL 3 | Buckinghamshire | |
| NUTS/ITL 2 | Berkshire, Buckinghamshire and Oxfordshire | |
| NUTS/ITL 1 | South East | |
| Country | England | E92000001 | 
| Date introduced | July 2020 | 
|---|---|
| Last updated | September 2025 | 
| User type | Small (addresses receive less than 25 items of mail per day) | 
| Quality | Within the building of the matched address closest to the postcode mean | 
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
|---|---|---|
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Smaller rural: Nearer to a major town or city | |
| Rural/urban (2011) | Rural hamlet and isolated dwellings | |
| Built up area (2024) | Longwick | E63011600 | 
| Census output area (2021) | E00090238 | |
| Census output area (2011) | 1A2 | |
| Lower layer super output area (2021) | Buckinghamshire 025A | E01017885 | 
| Lower layer super output area (2011) | Wycombe 002A | E01017885 | 
| Middle layer super output area (2021) | Longwick, Kimble & Lacey Green | E02003697 | 
| Middle layer super output area (2011) | Longwick, Kimble & Lacey Green | E02003697 | 
| Travel to work area | High Wycombe and Aylesbury | E30000218 | 
| Average property price in Hemel Hempstead | £445,841 | 
|---|---|
| Annual change | -1.0% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 9 Lammas Close, Longwick | Detached (freehold) | Jan 2021 | £710,000 | 
| 7 Lammas Close, Longwick | Detached (freehold) | Sep 2020 | £860,000 | 
| 5 Lammas Close, Longwick | Semi-detached (freehold) | Sep 2020 | £623,500 | 
| 8 Lammas Close, Longwick | Detached (freehold) | Aug 2020 | £675,000 | 
| 6 Lammas Close, Longwick | Semi-detached (freehold) | Jul 2020 | £625,000 |