| Postcode | WD18 7BZ | 
|---|---|
| Post Town | Kings Langley, Watford | 
| Nearest station | Watford (1 km) | 
| Bus stops | 
                       Hagden Lane (E) 
Cassiobridge Road (E) 
Hagden Lane (W) 
Metropolitan Station Approach (W) 
Gade Close (W) 
Gade Close (E) 
                     | 
                  
| Roads in this postcode | |
| Number of UPRNs | 54 View | 
| Known addresses | 
                       Flat 32, Sonar House, 477 - 479 Whippendell Road, Watford 
                            Flat 35, Sonar House, 477 - 479 Whippendell Road, Watford 
                            Flat 37, Sonar House, 477 - 479 Whippendell Road, Watford 
                            Flat 38, Sonar House, 477 - 479 Whippendell Road, Watford 
                            Flat 39, Sonar House, 477 - 479 Whippendell Road, Watford 
                       | 
                  
| Main property type | Flat | 
| Businesses | 
| Latitude | 51.651075 | |
|---|---|---|
| Longitude | -0.418762 | |
| Easting | 509492 | |
| Northing | 195882 | |
| Grid reference | TQ094958 | |
| UTM reference | 30U 678563 5725386 | |
| what3words | recent.joke.sung | |
| FixPhrase | crinkle magical snowiness thickness | |
| Plus code | 9C3XMH2J+CF | |
| Altitude | 65 metres (214 feet) | |
| Sunrise (today) | 7:02 | |
| Sunset (today) | 16:30 | |
| Distance away | ||
| Distance to sea | 61.4 KMs (38.1 miles) | 
| Parish | Watford, unparished area | E43000082 | 
|---|---|---|
| Ward | Holywell | E05011048 | 
| Local Authority District | Watford | E07000103 | 
| County Electoral Division | West Watford | E58000677 | 
| Local Authority | Hertfordshire | E10000015 | 
| County | Hertfordshire | E10000015 | 
| Constituency (2024) | Watford | E14001568 | 
| MP | Matt Turmaine | Labour | 
| Police force | Hertfordshire | |
| NUTS/ITL 3 | South West Hertfordshire | |
| NUTS/ITL 2 | Bedfordshire and Hertfordshire | |
| NUTS/ITL 1 | East of England | |
| Country | England | E92000001 | 
| Date introduced | November 2022 | 
|---|---|
| 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) | Urban: Nearer to a major town or city | |
| Rural/urban (2011) | Urban major conurbation | |
| Built up area (2024) | Watford (Watford) | E63011741 | 
| Census output area (2021) | E00169695 | |
| Census output area (2011) | 4C2 | |
| Lower layer super output area (2021) | Watford 011F | E01035579 | 
| Lower layer super output area (2011) | Watford 011E | E01023867 | 
| Middle layer super output area (2021) | Holywell | E02004978 | 
| Middle layer super output area (2011) | Holywell | E02004978 | 
| Travel to work area | Luton | E30000237 | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Flat 32, Sonar House, 477 - 479 Whippendell Road, Watford | New build flat (leasehold) | May 2023 | £145,062 | 
| Flat 35, Sonar House, 477 - 479 Whippendell Road, Watford | New build flat (leasehold) | Apr 2023 | £177,500 | 
| Flat 39, Sonar House, 477 - 479 Whippendell Road, Watford | New build flat (leasehold) | Apr 2023 | £108,000 | 
| Flat 37, Sonar House, 477 - 479 Whippendell Road, Watford | New build flat (leasehold) | Apr 2023 | £108,000 | 
| Flat 38, Sonar House, 477 - 479 Whippendell Road, Watford | New build flat (leasehold) | Mar 2023 | £108,000 |