SL7 postcode district: Marlow and around
SL7 is a postcode district in England, with 695 postcodes in use in 4 sectors. It has postcodes in Marlow, Marlow Bottom and Cookham. It is split between 2 councils: Buckinghamshire (672 postcodes) and Windsor and Maidenhead (23).
- Postcodes in use
- 695
- Sectors
- 4
- Councils
- 2 councils
- Places
- 3 places
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources
Every postcode in SL7, and which are new since 2020
- New since 2020: 14
- In use before 2020: 681
- Outline: where 5 or more new postcodes since 2020 lie together
Of the 695 postcodes in SL7 that ONS places, 14 are new since 2020 and 681 were in use before 2020.
Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. New since 2020 means it came into use in January 2020 or later. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.
The middle of its postcodes: latitude 51.5755, longitude -0.7782. Open this area on OpenStreetMap
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them
The 5 newest postcodes
Where the new postcodes lie together
- 7 new postcodes since 2020, outlined on the map. SL7 9FB, is the newest of them.
What broadband can you get in SL7?
Ofcom reports on 676 of the 695 postcodes in SL7. At 461 of them every home and business can get gigabit broadband, and at 6 some cannot get decent broadband (10 Mbit/s).
Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.
Check one address on Ofcom's checkerSource: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it
Is SL7 at risk of flooding?
174 of the 695 postcodes in SL7 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 835 homes and businesses in an area at high or medium risk.
High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.
Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.
Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it
What do homes sell for in SL7?
Homes in SL7 sold for a typical £675,000 in the 12 months to August 2026, across 239 sales, no change on the 12 months before, HM Land Registry's figures show.
- Detached £963,750 88 sales
- Semi-detached £629,500 42 sales
- Terraced £555,000 60 sales
- Flat or maisonette £345,000 49 sales
Each bar is that kind's typical price, against the most expensive kind here.
Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.
Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it
Postcodes in SL7
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in SL7
Towns and villages with postcodes in SL7, and how many each has here.
Who covers SL7
How many of the district's postcodes in use fall under each council, constituency and police force area.
Councils
What council am I in?Constituencies
- Beaconsfield519
- Wycombe153
- Maidenhead23
Police force areas
- Thames Valley695
Next to SL7
"Next to" is by number: the districts before and after SL7 in the SL area.
Check a postcode
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