| Postcode | AL5 5QP | 
|---|---|
| Post Town | Harpenden | 
| Nearest station | Harpenden (1 km) | 
| Bus stops | Langdale Avenue (NE) Tylers (SE) Martham Court (SE) Batford Road (NW) Batford Road (SE) Martham Court (NW) | 
| Roads in this postcode | |
| Number of UPRNs | 31 View | 
| Known addresses | 1 Granby Avenue, Harpenden 3 Granby Avenue, Harpenden 5 Granby Avenue, Harpenden 7 Granby Avenue, Harpenden 9 Granby Avenue, Harpenden 17 Granby Avenue, Harpenden 19 Granby Avenue, Harpenden 21 Granby Avenue, Harpenden 23 Granby Avenue, Harpenden 25 Granby Avenue, Harpenden 27 Granby Avenue, Harpenden 29 Granby Avenue, Harpenden 31 Granby Avenue, Harpenden 37 Granby Avenue, Harpenden 39 Granby Avenue, Harpenden 41 Granby Avenue, Harpenden 45 Granby Avenue, Harpenden 47 Granby Avenue, Harpenden 51 Granby Avenue, Harpenden 53 Granby Avenue, Harpenden 55 Granby Avenue, Harpenden 55A Granby Avenue, Harpenden 57 Granby Avenue, Harpenden 59 Granby Avenue, Harpenden | 
| Main property type | Detached | 
| Businesses | 
| Latitude | 51.819125 | |
|---|---|---|
| Longitude | -0.339091 | |
| Easting | 514578 | |
| Northing | 214693 | |
| Grid reference | TL145146 | |
| UTM reference | 30U 683392 5744269 | |
| what3words | saving.tuned.twin | |
| FixPhrase | crisped magician shading thespian | |
| Plus code | 9C3XRM96+M9 | |
| Altitude | 107 metres (353 feet) | |
| Sunrise (today) | 6:55 | |
| Sunset (today) | 16:37 | |
| Distance away | ||
| Distance to sea | 64.8 KMs (40.3 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) | 73 | |
|---|---|---|
| Households (2011) | 26 | |
| 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) | E00120285 | |
| Census output area (2011) | 6A4 | |
| Lower layer super output area (2021) | St Albans 002A | E01023685 | 
| Lower layer super output area (2011) | St Albans 002A | E01023685 | 
| 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 | 
|---|---|---|---|
| 3 Granby Avenue, Harpenden | Detached (freehold) | Jan 2025 | £1,115,000 | 
| 17 Granby Avenue, Harpenden | Detached (freehold) | Dec 2024 | £1,090,000 | 
| 37 Granby Avenue, Harpenden | Semi-detached (freehold) | Sep 2023 | £1,090,000 | 
| Semi-detached (freehold) | Feb 2015 | £875,000 | |
| Semi-detached (freehold) | Jul 2006 | £382,500 | |
| 23 Granby Avenue, Harpenden | Detached (freehold) | Aug 2023 | £1,395,000 | 
| 29 Granby Avenue, Harpenden | Other (freehold) | Apr 2022 | £1,780,000 | 
| Detached (freehold) | Oct 2014 | £900,000 | |
| Detached (freehold) | Oct 2010 | £705,000 | |
| 45 Granby Avenue, Harpenden | Semi-detached (freehold) | Dec 2021 | £1,285,000 | 
| Semi-detached (freehold) | Jun 2008 | £460,000 | |
| Semi-detached (freehold) | Jun 1996 | £118,500 | |
| 55A Granby Avenue, Harpenden | Detached (freehold) | Oct 2019 | £690,000 | 
| Detached (freehold) | Mar 2016 | £725,000 | |
| Detached (freehold) | Jun 1997 | £139,950 | |
| 19 Granby Avenue, Harpenden | Detached (freehold) | Sep 2019 | £1,090,000 | 
| Detached (freehold) | Aug 1998 | £249,720 | |
| Detached (freehold) | Feb 1997 | £133,500 | |
| 21 Granby Avenue, Harpenden | Detached (freehold) | May 2019 | £1,050,000 | 
| Detached (freehold) | Jan 2018 | £1,025,000 | |
| Detached (freehold) | Jan 2008 | £710,000 | |
| Detached (freehold) | May 2000 | £425,000 | |
| 25 Granby Avenue, Harpenden | Detached (freehold) | May 2018 | £1,515,000 | 
| Detached (freehold) | Feb 2015 | £915,000 | |
| Detached (freehold) | Oct 2005 | £485,000 |