Postcode district guide

HA4 postcode guide

Explore HA4: find local agencies, essential services and get ready for your move. The map shows the HA4 district and its approximate centre. Crime figures describe a one-mile circle around that centre. Check individual properties with the official services below.

Postcode area
HA — Harrow
Region
London
Country
England

The interactive map loads with JavaScript. You can also open this area in OpenStreetMap.

Approximate district centre · not a boundary mapOpen map

Your area at a glance

The everyday essentials.

Agencies1 listedNone confirmed by our team yetSee agencies Water2 possible companiesThames Water (water and sewerage) · Affinity Water (drinking water only)Water & sewerage ElectricityDepends on the propertyCheck a bill or ask the landlordHow to find it CouncilHarrow or HillingdonConfirm yours by addressCouncil services BroadbandCheck the exact addressOfcom availability and coverageRun the checks
Aug 2026 · latest police data

Recorded crime nearby

1-mile circle around the HA4 district centre; not the whole district.

Full breakdown
171crime records returnedCoverage not verified, so not a full total
55anti-social behaviour recordsCoverage not verified, so not a full total

Most recorded crimes

Coverage or verification is incomplete, so these records cannot support a category ranking.

Recorded crime is not all crime, and locations are anonymised. Counts are not rates or a safety rating.data.police.uk · OGL v3.0 · Fetched 12 Oct 2026

Local rental market

This location covers several rental-market areas. Each is shown separately; no combined average or listing comparison is made.

Match basis: district candidates. Postcode geography · Scottish BRMA boundaries

Area context is not a property valuation or evidence of overcharging. PIPR describes rental stock, including existing tenancies; an advertised listing is an asking rent. Size, condition, amenities and tenancy dates may differ. Bedroom and property-type figures are separate series and are never combined.

Collection differs across nations: England and Wales mainly use achieved rents; Northern Ireland uses newly advertised rents; Scottish data historically focused on advertised new lets, with achieved rents increasingly included. The latest two UK months are provisional under ONS methodology. Source markers [p] and [r], where supplied, are distinct from revisions detected between imports. ONS methodology.

Harrow E09000015

local authority · August 2026 · available

Published monthly rents and annual change for Harrow
Published categoryMonthly rentAnnual change
All properties£1,778.002.9%
One bedroom£1,394.002.7%
Two bedrooms£1,715.002.7%
Three bedrooms£2,064.003.3%
Four or more bedrooms£2,789.002.6%
Detached£2,756.002.2%
Flats and maisonettes£1,615.002.7%
Semi-detached£2,247.003.3%
Terraced£2,013.003.5%

Source: Office for National Statistics, Price Index of Private Rents. Open Government Licence v3.0. Download workbook. Published 2026-09-16; fetched 2026-10-15T09:15:01Z. Next release: 2026-10-21.

Hillingdon E09000017

local authority · August 2026 · available

Published monthly rents and annual change for Hillingdon
Published categoryMonthly rentAnnual change
All properties£1,570.002.5%
One bedroom£1,252.002.6%
Two bedrooms£1,586.002.5%
Three bedrooms£1,913.003.0%
Four or more bedrooms£2,634.002.3%
Detached£2,375.002.4%
Flats and maisonettes£1,445.002.3%
Semi-detached£2,019.003.0%
Terraced£1,738.003.1%

Source: Office for National Statistics, Price Index of Private Rents. Open Government Licence v3.0. Download workbook. Published 2026-09-16; fetched 2026-10-15T09:15:01Z. Next release: 2026-10-21.

01Local letting agencies

Agencies covering HA4

Coverage is listed by postcode district. Unconfirmed agencies have not completed our platform approval and cannot access renter briefs.

02Your area essentials

Water & sewerage

These companies may serve addresses in the wider HA postcode area. This is an area-level suggestion: confirm the full address before opening an account.

Water and sewerage

Thames Water

Supplies water and takes waste water across London and the Thames Valley. It is the largest water company in the UK by number of customers. In outer London and the home counties the taps are often supplied by Affinity Water or SES Water while Thames Water still handles the sewerage.

Thames Water official website
Drinking water only

Affinity Water

Supplies drinking water to parts of Hertfordshire, Bedfordshire, Buckinghamshire, Essex, Surrey and north-west London. It does not take waste water away, so a second company — usually Thames Water, Anglian Water or Southern Water — handles sewerage and often bills for both.

Affinity Water official website
Before you sign up

Supplier boundaries can split a district, and drinking water and sewerage may come from different companies.

Check your address with Water UK

03Your area essentials

Find your electricity supplier

The company billing a home depends on that property. A postcode district cannot tell you which supplier currently holds the account.

Network operator
Maintains the cables
Electricity supplier
Bills you

Start with a recent bill or ask the landlord

If you cannot find a bill, use the official guidance to identify the network operator and ask for the property’s supplier details.

Find your supplier with Ofgem’s guidance

04Your area essentials

Your council & local services

This district contains postcodes in more than one council area. Confirm the council for your exact address before registering or applying for services.

Harrow

Harrow council website

Some services open the council homepage, where you can find the relevant department.

Hillingdon

Hillingdon council website

Some services open the council homepage, where you can find the relevant department.

05Your area essentials

Broadband & mobile

Check the full postcode and property before you commit. Availability and indoor signal can differ between neighbouring homes.

Ofcom · broadband

Broadband at the address

Look up available connections with Ofcom. Confirm installation timing and the service offered with the provider.

Check broadband availability
Ofcom · mobile

Mobile coverage

Compare Ofcom’s coverage predictions, then check the signal inside the home when you view it.

Check mobile coverage

06Your area essentials

Make the next step easier

A few practical guides for viewing a place, setting up a new home and leaving the old one.

  1. Viewing checklistOpen guide
  2. Moving-in checklistOpen guide
  3. Moving-out checklistOpen guide

Found an area you like?

Keep the places you’re considering, viewing notes and household decisions together in a rent hunt.

Start a rent hunt

Guide updated 2026-10-05. Postcode snapshot: 2026-05. Council links reviewed 2026-09-28.

ONS Postcode Directory — May 2026 (Great Britain only)GOV.UK Local Links Manager

Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Council links: GOV.UK, Open Government Licence v3.0.