| Postcode | AL9 7HX | 
|---|---|
| Post Town | Hatfield | 
| Nearest station | Welham Green (0 km) | 
| Bus stops | Duke's Ride Lodge (S) Marshmoor Cottages (NW) Marshmoor Cottages (SE) Welham Green Rail Station () The Rookery (NW) Welham Green Railway Station (W) | 
| Roads in this postcode | |
| Number of UPRNs | 4 View | 
| Known addresses | 1 Marshmoor House, Marshmoor Lane, Welham Green 2 Marshmoor House, Marshmoor Lane, Welham Green | 
| Main property type | Flat | 
| Businesses | 
                        No businesses found
                     | 
| Latitude | 51.739416 | |
|---|---|---|
| Longitude | -0.212649 | |
| Easting | 523509 | |
| Northing | 206035 | |
| Grid reference | TL235060 | |
| UTM reference | 30U 692444 5735732 | |
| what3words | down.cars.assume | |
| FixPhrase | crinkly magma skyward undying | |
| Plus code | 9C3XPQQP+QW | |
| Altitude | 89 metres (292 feet) | |
| Sunrise (today) | 6:54 | |
| Sunset (today) | 16:37 | |
| Distance away | ||
| Distance to sea | 52.8 KMs (32.8 miles) | 
| Parish | North Mymms | E04012223 | 
|---|---|---|
| Ward | Welham Green and Hatfield South | E05011071 | 
| Local Authority District | Welwyn Hatfield | E07000241 | 
| County Electoral Division | Hatfield South | E58000630 | 
| Local Authority | Hertfordshire | E10000015 | 
| County | Hertfordshire | E10000015 | 
| Constituency (2024) | Welwyn Hatfield | E14001573 | 
| MP | Andrew Lewin | Labour | 
| Police force | Hertfordshire | |
| Water company | Affinity Water | |
| Sewage company | Thames Water | |
| NUTS/ITL 3 | North and East 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) | 5 | |
|---|---|---|
| Households (2011) | 2 | |
| 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) | Welham Green | E63011583 | 
| Census output area (2021) | E00121678 | |
| Census output area (2011) | 1B2 | |
| Lower layer super output area (2021) | Welwyn Hatfield 017C | E01035608 | 
| Lower layer super output area (2011) | Welwyn Hatfield 014C | E01023964 | 
| Middle layer super output area (2021) | Welham Green | E02007092 | 
| Middle layer super output area (2011) | Welham Green | E02004993 | 
| Travel to work area | Stevenage and Welwyn Garden City | E30000272 | 
| Average property price in St Albans | £541,094 | 
|---|---|
| Annual change | -0.5% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 2 Marshmoor House, Marshmoor Lane, Welham Green | Flat (leasehold) | Jul 2017 | £249,999 | 
| 1 Marshmoor House, Marshmoor Lane, Welham Green | Flat (leasehold) | Sep 2010 | £165,000 | 
| Flat (leasehold) | Nov 2008 | £130,000 |