| Postcode | HA3 8AX | 
|---|---|
| Post Town | Harrow | 
| Nearest station | Kenton (0 km) | 
| Bus stops | Carlton Avenue Kenton (NE) Upton Gardens (SW) Northwick Park Station (W) Northwick Avenue (NE) Gayton Road Northwick Park (E) Odeon Parade  Upton Gardens (E) | 
| London travel zone | 4 | 
| Roads in this postcode | |
| Number of UPRNs | 42 View | 
| Known addresses | 3B Carlton Avenue, Harrow 3D Carlton Avenue, Harrow 3F Carlton Avenue, Harrow 9 Carlton Avenue, Harrow 13 Carlton Avenue, Harrow 15 Carlton Avenue, Harrow 17 Carlton Avenue, Harrow 19 Carlton Avenue, Harrow 25 Carlton Avenue, Harrow 25A Carlton Avenue, Harrow 27A Carlton Avenue, Harrow 29 Carlton Avenue, Harrow 33 Carlton Avenue, Harrow 35 Carlton Avenue, Harrow 37 Carlton Avenue, Harrow 39A Carlton Avenue, Harrow 43 Carlton Avenue, Harrow 47 Carlton Avenue, Harrow | 
| Main property type | Semi-detached | 
| Businesses | 
| Latitude | 51.584214 | |
|---|---|---|
| Longitude | -0.318977 | |
| Easting | 516566 | |
| Northing | 188600 | |
| Grid reference | TQ165886 | |
| UTM reference | 30U 685738 5718200 | |
| what3words | return.winner.crest | |
| FixPhrase | cringing magician stuffy trance | |
| Plus code | 9C3XHMMJ+MC | |
| Altitude | 52 metres (170 feet) | |
| Sunrise (today) | 6:54 | |
| Sunset (today) | 16:37 | |
| Distance away | ||
| Distance to sea | 52.5 KMs (32.6 miles) | 
| Parish | Harrow, unparished area | E43000205 | 
|---|---|---|
| Ward | Kenton West | E05013552 | 
| London Borough | Harrow | E09000015 | 
| County | Greater London | E11000009 | 
| Constituency (2024) | Harrow East | E14001270 | 
| MP | Bob Blackman | Conservative | 
| Police force | Metropolitan Police | |
| Water company | Affinity Water | |
| Sewage company | Thames Water | |
| NUTS/ITL 3 | Harrow and Hillingdon | |
| NUTS/ITL 2 | Outer London - West and North West | |
| NUTS/ITL 1 | London | |
| 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) | 104 | |
|---|---|---|
| Households (2011) | 32 | |
| 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 major conurbation | |
| Built up area (2024) | Harrow | E63011900 | 
| Census output area (2021) | E00010901 | |
| Census output area (2011) | 4C2 | |
| Lower layer super output area (2021) | Harrow 033G | E01002176 | 
| Lower layer super output area (2011) | Harrow 033G | E01002176 | 
| Middle layer super output area (2021) | Kenton West | E02006882 | 
| Middle layer super output area (2011) | Kenton West | E02006882 | 
| Travel to work area | London | E30000234 | 
| Average property price in Harrow | £533,144 | 
|---|---|
| Annual change | 0.3% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 33 Carlton Avenue, Harrow | Semi-detached (freehold) | Aug 2023 | £610,000 | 
| 29 Carlton Avenue, Harrow | Semi-detached (freehold) | Jan 2016 | £680,000 | 
| Semi-detached (freehold) | Mar 2006 | £267,000 | |
| 19 Carlton Avenue, Harrow | Semi-detached (freehold) | Jan 2015 | £460,000 | 
| 47 Carlton Avenue, Harrow | Semi-detached (freehold) | Dec 2013 | £560,000 | 
| Semi-detached (freehold) | Aug 2005 | £305,000 | |
| 43 Carlton Avenue, Harrow | Semi-detached (freehold) | Jun 2012 | £383,500 | 
| Semi-detached (freehold) | Sep 1999 | £163,000 | |
| 25 Carlton Avenue, Harrow | Flat (leasehold) | Feb 2012 | £185,000 | 
| 39A Carlton Avenue, Harrow | Flat (leasehold) | Jun 2006 | £187,000 | 
| Flat (leasehold) | May 1999 | £60,000 | |
| 17 Carlton Avenue, Harrow | Semi-detached (freehold) | Mar 2006 | £369,950 | 
| Semi-detached (freehold) | Feb 2000 | £205,000 | |
| 15 Carlton Avenue, Harrow | Semi-detached (freehold) | Oct 2005 | £330,000 | 
| 3D Carlton Avenue, Harrow | Flat (leasehold) | Oct 2002 | £125,000 | 
| Flat (leasehold) | Jan 1997 | £44,000 | |
| Flat (leasehold) | Mar 1996 | £43,500 |