MK18 4DL

Grendon Underwood & The Claydons · Buckinghamshire · England

Updated September 2026

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Location overview

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Ward: Grendon Underwood & The Claydons
Local authority: Buckinghamshire
Constituency: Buckingham and Bletchley
Postcode district: MK18
Postcode sector: MK18 4

Nearby postcodes

Nearby postcode distances
Postcode	Distance
MK18 4LA	436 m
MK18 4JU	576 m
MK18 4JX	617 m
MK18 4LB	636 m
MK18 4JZ	685 m

Complete postcode fields and official codes

Postcode: MK18 4DL
Status: Current
Introduced: 1 June 2000
Terminated: Not published
Postcode area: MK
Postcode district: MK18
Postcode sector: MK18 4
Latitude: 51.968326
Longitude: -1.071948
British National Grid easting: 463,853
British National Grid northing: 230,389

Statistical and administrative geographies

Country: England · E92000001
Region: South East · E12000008
Local authority district: Buckinghamshire · E06000060
Electoral ward: Grendon Underwood & The Claydons · E05015953
Parish or community: E04001459
Westminster constituency: Buckingham and Bletchley · E14001141
Output area: E00089399
Lower layer super output area: Buckinghamshire 004F · E01017718
Middle layer super output area: Buckinghamshire 004 · E02003655

Postcode source versions

Ordnance Survey: Code-Point Open Version 2026-08 · Current postcode units in Great Britain · OGL-3.0
Office for National Statistics: ONS Postcode Directory Version 2026-08 · United Kingdom; Northern Ireland excluded pending rights review; Crown Dependencies outside product scope · OGL-3.0 with third-party rights
Ordnance Survey: Boundary-Line Version 2026-05 · Local-authority boundaries in Great Britain · OS OpenData Licence

Explore MK18

Use the wider postcode district to compare the same evidence across more locations.

Schools

Within 3.1 miles of this postcode

View all nearby schools

Open schools: 4
Primary: 4
Secondary: 0

Finmere Church of England Primary School

Academy converter
2.4 km
Fringford Church of England Primary School

Voluntary controlled school
3.8 km
Roundwood Primary School

Community school
4.5 km

Census 2021

Population and age profile

Postcode residents: 2
Postcode households: 1
Residents per household: 2.0
MK18 4 residents: 4,055

Age bands in MK18 4

Wider postcode sector

Age 0 to 14: 15.9%
Age 15 to 24: 10.3%
Age 25 to 44: 19.2%
Age 45 to 64: 31.7%
Age 65 and over: 22.8%

This postcode contained 0% of the sector's usual residents on Census Day. The age profile describes the wider MK18 4 sector, not people in this individual postcode.

How to read these estimates

The standard postcode headcounts and the commissioned age table are separate ONS outputs. Small counts are disclosure-controlled, and totals can differ slightly between tables. Coverage is England and Wales only.

Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.

Fixed broadband coverage

Ofcom's predicted availability across all residential and commercial premises in this postcode in January 2026.

Superfast, 30 Mbit/s+: 100%
Ultrafast, 100 Mbit/s+: 100%
Ultrafast, 300 Mbit/s+: 100%
Gigabit-capable: 100%

Unable to receive decent fixed or FWA broadband: 0%
Next Generation Access: 100%
Decent broadband available from fixed wireless: 0%

Coverage is a modelled postcode-level snapshot, not a speed test or a guarantee for a named property. Check availability with providers before making a decision. Ofcom does not publish postcode-level full-fibre coverage in this release for commercial-confidentiality reasons.

Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.

Nearby transport

St James's Church

BCT · Barton Hartshorn
0.4 miles
St James's Church

BCT · Barton Hartshorn
0.4 miles
St Nicholas's Church

BCT · Chetwode
0.4 miles
St Nicholas's Church

BCT · Chetwode
0.4 miles
Rectory

BCT · Newton Purcell
0.8 miles

Relative deprivation

English Indices of Deprivation 2025 for Buckinghamshire 004F, the published LSOA linked to this postcode. Decile 1 contains the most deprived 10% of English LSOAs and decile 10 the least deprived 10%.

Overall IMD decile

8 of 10

Overall England rank

23,963 of 33,755

Income: 9 of 10
Employment: 9 of 10
Education and skills: 8 of 10
Health and disability: 10 of 10
Crime: 10 of 10
Housing and services: 1 of 10
Living environment: 4 of 10

These are relative area statistics, not measures of an individual household, affluence or absolute change. They cannot be compared with indices for other UK nations. Source: English Indices of Deprivation 2025, version 2025-v2.

Flood risk

Environment Agency long-term indicators for the area around addresses in this postcode. They are not an assessment of any individual property and do not show current or forecast flooding.

High risk addresses: 0
Medium risk addresses: 0
Low risk addresses: 0
Groundwater flood alert area: Unlikely

Source: Environment Agency flood-risk postcode search tool data, version 2026-06-18. Check the long-term risk for an individual area. © Environment Agency copyright and/or database right 2025. All rights reserved.

Evidence in context

A factual reading of the data in this report's scope. It is not a location score or a recommendation.

Schools

Published establishments

4 open schools are in scope, including 4 primary and 0 secondary schools. Finmere Church of England Primary School is the nearest published school at 1.5 miles.

Counts describe active establishment records. They do not assess admissions, catchments or quality.