| Postcode | AL5 5JG | 
|---|---|
| Post Town | Harpenden | 
| Nearest station | Harpenden (2 km) | 
| Bus stops | Porters Hill (NW) Willow Way (NE) Pickford Hill (SE) Willoughby Road (NW) Lower Luton Road West (NE) Westfield Road (SE) | 
| Roads in this postcode | |
| Number of UPRNs | 21 View | 
| Known addresses | 1 St Martins Close, Harpenden 2 St Martins Close, Harpenden 4 St Martins Close, Harpenden 6 St Martins Close, Harpenden 7 St Martins Close, Harpenden 8 St Martins Close, Harpenden 9 St Martins Close, Harpenden 11 St Martins Close, Harpenden 12 St Martins Close, Harpenden 13 St Martins Close, Harpenden 16 St Martins Close, Harpenden 17 St Martins Close, Harpenden 18 St Martins Close, Harpenden 19 St Martins Close, Harpenden | 
| Main property type | Terraced | 
| Businesses | 
                        No businesses found
                     | 
| Latitude | 51.828445 | |
|---|---|---|
| Longitude | -0.343827 | |
| Easting | 514228 | |
| Northing | 215722 | |
| Grid reference | TL142157 | |
| UTM reference | 30U 683028 5745294 | |
| what3words | cover.steps.leads | |
| FixPhrase | crisped magician shredding underwent | |
| Plus code | 9C3XRMH4+9F | |
| Altitude | 96 metres (315 feet) | |
| Sunrise (today) | 6:55 | |
| Sunset (today) | 16:37 | |
| Distance away | ||
| Distance to sea | 65.7 KMs (40.8 miles) | 
| Parish | Harpenden Town | E04013284 | 
|---|---|---|
| Ward | Harpenden East | E05013952 | 
| Local Authority District | St Albans | E07000240 | 
| County Electoral Division | Harpenden North East | E58000624 | 
| Local Authority | Hertfordshire | E10000015 | 
| County | Hertfordshire | E10000015 | 
| Constituency (2024) | Harpenden and Berkhamsted | E14001268 | 
| MP | Victoria Collins | Liberal Democrat | 
| Police force | Hertfordshire | |
| Water company | Affinity Water | |
| Sewage company | Thames Water | |
| NUTS/ITL 3 | South West Hertfordshire | |
| NUTS/ITL 2 | Bedfordshire and Hertfordshire | |
| NUTS/ITL 1 | East of England | |
| Country | England | E92000001 | 
| Date introduced | January 1980 | 
|---|---|
| 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 | 
| Population (2011) | 42 | |
|---|---|---|
| Households (2011) | 19 | |
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Urban: Nearer to a major town or city | |
| Rural/urban (2011) | Urban city and town | |
| Built up area (2024) | Harpenden | E63011425 | 
| Census output area (2021) | E00120298 | |
| Census output area (2011) | 4A2 | |
| Lower layer super output area (2021) | St Albans 002C | E01023687 | 
| Lower layer super output area (2011) | St Albans 002C | E01023687 | 
| Middle layer super output area (2021) | Harpenden East | E02004925 | 
| Middle layer super output area (2011) | Harpenden East | E02004925 | 
| Travel to work area | Luton | E30000237 | 
| Average property price in St Albans | £541,094 | 
|---|---|
| Annual change | -0.5% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 9 St Martins Close, Harpenden | Terraced (freehold) | Jul 2025 | £506,500 | 
| Terraced (freehold) | Nov 2003 | £188,000 | |
| Terraced (freehold) | Jun 2001 | £132,000 | |
| 19 St Martins Close, Harpenden | Semi-detached (freehold) | Dec 2023 | £430,000 | 
| 6 St Martins Close, Harpenden | Terraced (freehold) | Aug 2023 | £465,000 | 
| 11 St Martins Close, Harpenden | Terraced (freehold) | Mar 2021 | £450,000 | 
| Terraced (freehold) | Mar 2015 | £350,000 | |
| Terraced (freehold) | May 2002 | £169,950 | |
| Terraced (freehold) | Jan 1995 | £68,000 | |
| 16 St Martins Close, Harpenden | Terraced (freehold) | Mar 2021 | £410,000 | 
| Terraced (freehold) | Feb 2009 | £60,000 | |
| 18 St Martins Close, Harpenden | Terraced (freehold) | Jan 2019 | £427,500 | 
| Terraced (freehold) | Jul 2012 | £247,500 | |
| 17 St Martins Close, Harpenden | Terraced (freehold) | Jun 2018 | £450,000 | 
| 1 St Martins Close, Harpenden | Terraced (freehold) | Mar 2018 | £450,000 | 
| 13 St Martins Close, Harpenden | Terraced (freehold) | Dec 2012 | £335,000 | 
| Terraced (freehold) | Sep 2011 | £250,000 | |
| 4 St Martins Close, Harpenden | Terraced (freehold) | Aug 2005 | £235,000 | 
| Terraced (freehold) | Mar 2003 | £179,950 |