UB9 postcode district: Hillingdon and around

UB9 is a postcode district in England, with 431 postcodes in use in 3 sectors. It has postcodes in Hillingdon. It is split between 3 councils: Buckinghamshire (225 postcodes), Hillingdon (205) and Three Rivers (1). 1 of its 431 postcodes is in Hertfordshire. ONS lists no county for the other 430.

Postcodes in use
431
Sectors
3
Councils
3 councils
Places
Hillingdon

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in UB9, by flood risk

Map of every postcode in UB9, by flood risk Of the 431 postcodes in UB9 that ONS places, 9 have a home or business at high risk, 15 are at medium risk at worst, 11 are at low risk at worst, 4 are at very low risk only and 392 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 16 postcodes at high or medium risk. Places named: Hillingdon, Iver Heath. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M25M40A412 UB9 4AA: not on the flood risk listUB9 4AD: not on the flood risk listUB9 4AS: not on the flood risk listUB9 4AX: not on the flood risk listUB9 4BA: not on the flood risk listUB9 4BB: not on the flood risk listUB9 4BD: not on the flood risk listUB9 4BF: not on the flood risk listUB9 4BX: not on the flood risk listUB9 4DB: not on the flood risk listUB9 4DE: not on the flood risk listUB9 4DF: not on the flood risk listUB9 4DG: not on the flood risk listUB9 4DP: not on the flood risk listUB9 4DS: not on the flood risk listUB9 4DW: not on the flood risk listUB9 4DZ: not on the flood risk listUB9 4EA: not on the flood risk listUB9 4EB: not on the flood risk listUB9 4ED: not on the flood risk listUB9 4EE: not on the flood risk listUB9 4EF: not on the flood risk listUB9 4EG: not on the flood risk listUB9 4EH: not on the flood risk listUB9 4EJ: not on the flood risk listUB9 4EL: not on the flood risk listUB9 4EP: not on the flood risk listUB9 4EQ: not on the flood risk listUB9 4GY: not on the flood risk listUB9 4HA: not on the flood risk listUB9 4HB: not on the flood risk listUB9 4HD: not on the flood risk listUB9 4HF: not on the flood risk listUB9 4HG: not on the flood risk listUB9 4HH: not on the flood risk listUB9 4HJ: not on the flood risk listUB9 4HL: not on the flood risk listUB9 4HN: not on the flood risk listUB9 4HP: not on the flood risk listUB9 4HQ: not on the flood risk listUB9 4HR: not on the flood risk listUB9 4HS: not on the flood risk listUB9 4HW: not on the flood risk listUB9 4LA: not on the flood risk listUB9 4LB: not on the flood risk listUB9 4LD: not on the flood risk listUB9 4LE: not on the flood risk listUB9 4LF: not on the flood risk listUB9 4LG: not on the flood risk listUB9 4LJ: not on the flood risk listUB9 4LQ: not on the flood risk listUB9 4NA: not on the flood risk listUB9 5AA: not on the flood risk listUB9 5AB: not on the flood risk listUB9 5AD: not on the flood risk listUB9 5AE: not on the flood risk listUB9 5AL: not on the flood risk listUB9 5AP: not on the flood risk listUB9 5AR: not on the flood risk listUB9 5AT: not on the flood risk listUB9 5AU: not on the flood risk listUB9 5AW: not on the flood risk listUB9 5AX: not on the flood risk listUB9 5AY: not on the flood risk listUB9 5AZ: not on the flood risk listUB9 5BA: not on the flood risk listUB9 5BB: not on the flood risk listUB9 5BD: not on the flood risk listUB9 5BG: not on the flood risk listUB9 5BH: not on the flood risk listUB9 5BL: not on the flood risk listUB9 5BN: not on the flood risk listUB9 5BP: not on the flood risk listUB9 5BT: not on the flood risk listUB9 5BU: not on the flood risk listUB9 5BY: not on the flood risk listUB9 5DA: not on the flood risk listUB9 5DB: not on the flood risk listUB9 5DD: not on the flood risk listUB9 5DE: not on the flood risk listUB9 5DF: not on the flood risk listUB9 5DG: not on the flood risk listUB9 5DH: not on the flood risk listUB9 5DJ: not on the flood risk listUB9 5DL: not on the flood risk listUB9 5DN: not on the flood risk listUB9 5DP: not on the flood risk listUB9 5DQ: not on the flood risk listUB9 5DR: not on the flood risk listUB9 5DS: not on the flood risk listUB9 5DW: not on the flood risk listUB9 5EA: not on the flood risk listUB9 5EB: not on the flood risk listUB9 5ED: not on the flood risk listUB9 5EE: not on the flood risk listUB9 5EF: not on the flood risk listUB9 5EG: not on the flood risk listUB9 5EH: not on the flood risk listUB9 5EJ: not on the flood risk listUB9 5EL: not on the flood risk listUB9 5EN: not on the flood risk listUB9 5EQ: not on the flood risk listUB9 5ER: not on the flood risk listUB9 5ES: not on the flood risk listUB9 5ET: not on the flood risk listUB9 5EU: not on the flood risk listUB9 5EX: not on the flood risk listUB9 5EZ: not on the flood risk listUB9 5FD: not on the flood risk listUB9 5FE: not on the flood risk listUB9 5FG: not on the flood risk listUB9 5FH: not on the flood risk listUB9 5FJ: not on the flood risk listUB9 5FN: not on the flood risk listUB9 5FP: not on the flood risk listUB9 5FQ: not on the flood risk listUB9 5GA: not on the flood risk listUB9 5GB: not on the flood risk listUB9 5GD: not on the flood risk listUB9 5GE: not on the flood risk listUB9 5GF: not on the flood risk listUB9 5HA: not on the flood risk listUB9 5HB: not on the flood risk listUB9 5HD: not on the flood risk listUB9 5HJ: not on the flood risk listUB9 5HN: not on the flood risk listUB9 5HT: not on the flood risk listUB9 5HU: not on the flood risk listUB9 5HX: not on the flood risk listUB9 5HY: not on the flood risk listUB9 5HZ: not on the flood risk listUB9 5JA: not on the flood risk listUB9 5JB: not on the flood risk listUB9 5JD: not on the flood risk listUB9 5JE: not on the flood risk listUB9 5JF: not on the flood risk listUB9 5JG: not on the flood risk listUB9 5JH: not on the flood risk listUB9 5JJ: not on the flood risk listUB9 5JL: not on the flood risk listUB9 5JN: not on the flood risk listUB9 5JP: not on the flood risk listUB9 5JQ: not on the flood risk listUB9 5JR: not on the flood risk listUB9 5JS: not on the flood risk listUB9 5JT: not on the flood risk listUB9 5JW: not on the flood risk listUB9 5JX: not on the flood risk listUB9 5JZ: not on the flood risk listUB9 5LA: not on the flood risk listUB9 5LB: not on the flood risk listUB9 5LD: not on the flood risk listUB9 5LE: not on the flood risk listUB9 5LF: not on the flood risk listUB9 5LG: not on the flood risk listUB9 5LJ: not on the flood risk listUB9 5LL: not on the flood risk listUB9 5LQ: not on the flood risk listUB9 5LY: not on the flood risk listUB9 5NA: not on the flood risk listUB9 5NB: not on the flood risk listUB9 5ND: not on the flood risk listUB9 5NE: not on the flood risk listUB9 5NF: not on the flood risk listUB9 5NH: not on the flood risk listUB9 5NJ: not on the flood risk listUB9 5NL: not on the flood risk listUB9 5NN: not on the flood risk listUB9 5NP: not on the flood risk listUB9 5NR: not on the flood risk listUB9 5NT: not on the flood risk listUB9 5NW: not on the flood risk listUB9 5NZ: not on the flood risk listUB9 5PB: not on the flood risk listUB9 5PE: not on the flood risk listUB9 5PH: not on the flood risk listUB9 5PL: not on the flood risk listUB9 5PN: not on the flood risk listUB9 5PP: not on the flood risk listUB9 6AA: not on the flood risk listUB9 6AB: not on the flood risk listUB9 6AD: not on the flood risk listUB9 6AE: not on the flood risk listUB9 6AF: not on the flood risk listUB9 6AG: not on the flood risk listUB9 6AH: not on the flood risk listUB9 6AJ: not on the flood risk listUB9 6AL: not on the flood risk listUB9 6AN: not on the flood risk listUB9 6AP: not on the flood risk listUB9 6AR: not on the flood risk listUB9 6AS: not on the flood risk listUB9 6AT: not on the flood risk listUB9 6AU: not on the flood risk listUB9 6AW: not on the flood risk listUB9 6AX: not on the flood risk listUB9 6AY: not on the flood risk listUB9 6AZ: not on the flood risk listUB9 6BB: not on the flood risk listUB9 6BD: not on the flood risk listUB9 6BE: not on the flood risk listUB9 6BG: not on the flood risk listUB9 6BH: not on the flood risk listUB9 6BJ: not on the flood risk listUB9 6BL: not on the flood risk listUB9 6BN: not on the flood risk listUB9 6BP: not on the flood risk listUB9 6BQ: not on the flood risk listUB9 6BS: not on the flood risk listUB9 6BT: not on the flood risk listUB9 6BU: not on the flood risk listUB9 6BW: not on the flood risk listUB9 6BY: not on the flood risk listUB9 6DA: not on the flood risk listUB9 6DD: not on the flood risk listUB9 6DE: not on the flood risk listUB9 6DG: not on the flood risk listUB9 6DH: not on the flood risk listUB9 6DJ: not on the flood risk listUB9 6DL: not on the flood risk listUB9 6DN: not on the flood risk listUB9 6DP: not on the flood risk listUB9 6DQ: not on the flood risk listUB9 6DR: not on the flood risk listUB9 6DS: not on the flood risk listUB9 6DT: not on the flood risk listUB9 6DW: not on the flood risk listUB9 6DX: not on the flood risk listUB9 6DY: not on the flood risk listUB9 6EB: not on the flood risk listUB9 6ED: not on the flood risk listUB9 6EE: not on the flood risk listUB9 6EG: not on the flood risk listUB9 6EH: not on the flood risk listUB9 6EJ: not on the flood risk listUB9 6EL: not on the flood risk listUB9 6EN: not on the flood risk listUB9 6EP: not on the flood risk listUB9 6EQ: not on the flood risk listUB9 6ES: not on the flood risk listUB9 6ET: not on the flood risk listUB9 6EU: not on the flood risk listUB9 6EX: not on the flood risk listUB9 6EY: not on the flood risk listUB9 6EZ: not on the flood risk listUB9 6FB: not on the flood risk listUB9 6FD: not on the flood risk listUB9 6FF: not on the flood risk listUB9 6FG: not on the flood risk listUB9 6FJ: not on the flood risk listUB9 6FL: not on the flood risk listUB9 6FP: not on the flood risk listUB9 6GA: not on the flood risk listUB9 6HA: not on the flood risk listUB9 6HB: not on the flood risk listUB9 6HD: not on the flood risk listUB9 6HE: not on the flood risk listUB9 6HF: not on the flood risk listUB9 6HH: not on the flood risk listUB9 6HJ: not on the flood risk listUB9 6HN: not on the flood risk listUB9 6HP: not on the flood risk listUB9 6HR: not on the flood risk listUB9 6HS: not on the flood risk listUB9 6HT: not on the flood risk listUB9 6HX: not on the flood risk listUB9 6HY: not on the flood risk listUB9 6JA: not on the flood risk listUB9 6JB: not on the flood risk listUB9 6JD: not on the flood risk listUB9 6JE: not on the flood risk listUB9 6JF: not on the flood risk listUB9 6JG: not on the flood risk listUB9 6JH: not on the flood risk listUB9 6JL: not on the flood risk listUB9 6JN: not on the flood risk listUB9 6JP: not on the flood risk listUB9 6JQ: not on the flood risk listUB9 6JR: not on the flood risk listUB9 6JS: not on the flood risk listUB9 6JT: not on the flood risk listUB9 6JU: not on the flood risk listUB9 6JW: not on the flood risk listUB9 6JX: not on the flood risk listUB9 6JY: not on the flood risk listUB9 6LA: not on the flood risk listUB9 6LB: not on the flood risk listUB9 6LD: not on the flood risk listUB9 6LE: not on the flood risk listUB9 6LF: not on the flood risk listUB9 6LH: not on the flood risk listUB9 6LJ: not on the flood risk listUB9 6LN: not on the flood risk listUB9 6LP: not on the flood risk listUB9 6LQ: not on the flood risk listUB9 6LT: not on the flood risk listUB9 6LW: not on the flood risk listUB9 6LX: not on the flood risk listUB9 6LY: not on the flood risk listUB9 6NA: not on the flood risk listUB9 6NB: not on the flood risk listUB9 6ND: not on the flood risk listUB9 6NE: not on the flood risk listUB9 6NF: not on the flood risk listUB9 6NG: not on the flood risk listUB9 6NH: not on the flood risk listUB9 6NJ: not on the flood risk listUB9 6NL: not on the flood risk listUB9 6NP: not on the flood risk listUB9 6NQ: not on the flood risk listUB9 6NS: not on the flood risk listUB9 6NU: not on the flood risk listUB9 6NW: not on the flood risk listUB9 6NX: not on the flood risk listUB9 6NZ: not on the flood risk listUB9 6PF: not on the flood risk listUB9 6PH: not on the flood risk listUB9 6PN: not on the flood risk listUB9 6PP: not on the flood risk listUB9 6PQ: not on the flood risk listUB9 6PR: not on the flood risk listUB9 6PS: not on the flood risk listUB9 6PT: not on the flood risk listUB9 6PU: not on the flood risk listUB9 6PW: not on the flood risk listUB9 6PX: not on the flood risk listUB9 6PY: not on the flood risk listUB9 6PZ: not on the flood risk listUB9 6QA: not on the flood risk listUB9 6QB: not on the flood risk listUB9 6QD: not on the flood risk listUB9 6QF: not on the flood risk listUB9 6QP: not on the flood risk listUB9 6QS: not on the flood risk listUB9 6RA: not on the flood risk listUB9 6RB: not on the flood risk listUB9 6RD: not on the flood risk listUB9 6RE: not on the flood risk listUB9 6RG: not on the flood risk listUB9 6RJ: not on the flood risk listUB9 6RL: not on the flood risk listUB9 6RP: not on the flood risk listUB9 6RQ: not on the flood risk listUB9 6TA: not on the flood risk listUB9 6TB: not on the flood risk listUB9 6TD: not on the flood risk listUB9 6TH: not on the flood risk listUB9 6TQ: not on the flood risk listUB9 6UX: not on the flood risk listUB9 4BE: very low flood risk onlyUB9 4DH: very low flood risk onlyUB9 4DN: very low flood risk onlyUB9 4DY: very low flood risk onlyUB9 4AT: low flood risk at worstUB9 5AH: low flood risk at worstUB9 5AJ: low flood risk at worstUB9 5BE: low flood risk at worstUB9 5HE: low flood risk at worstUB9 5PG: low flood risk at worstUB9 6FH: low flood risk at worstUB9 6HL: low flood risk at worstUB9 6HZ: low flood risk at worstUB9 6LS: low flood risk at worstUB9 4AG: medium flood risk at worstUB9 4AH: medium flood risk at worstUB9 4AJ: medium flood risk at worstUB9 4AL: medium flood risk at worstUB9 4AN: medium flood risk at worstUB9 4AP: medium flood risk at worstUB9 4AQ: medium flood risk at worstUB9 4AR: medium flood risk at worstUB9 4AU: medium flood risk at worstUB9 4AW: medium flood risk at worstUB9 4AY: medium flood risk at worstUB9 4AZ: medium flood risk at worstUB9 4DA: medium flood risk at worstUB9 5AS: medium flood risk at worstUB9 6PE: medium flood risk at worstUB9 4AF: high flood riskUB9 4BS: high flood riskUB9 4DQ: high flood riskUB9 4HE: high flood riskUB9 6LU: high flood riskUB9 6LZ: high flood riskUB9 6PB: high flood riskUB9 6PD: high flood riskUB9 6PG: high flood risk HillingdonIver Heath 16 postcodes at high or medium risk, outlined: this goes to UB9 4DQ, the one with most homes and businesses at high risk16 postcodes at high or medium risk Map of every postcode in UB9, by flood risk Of the 431 postcodes in UB9 that ONS places, 9 have a home or business at high risk, 15 are at medium risk at worst, 11 are at low risk at worst, 4 are at very low risk only and 392 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 16 postcodes at high or medium risk. Places named: Iver Heath. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A412A437 Iver Heath 16 postcodes at high or medium risk, outlined: this goes to UB9 4DQ, the one with most homes and businesses at high risk16 postcodes at high or medium risk
  • A home or business at high risk: 9
  • At medium risk at worst: 15
  • At low risk at worst: 11
  • At very low risk only: 4
  • Not on the at-risk list: 392
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 431 postcodes in UB9 that ONS places, 9 have a home or business at high risk, 15 are at medium risk at worst, 11 are at low risk at worst, 4 are at very low risk only and 392 are not on the Environment Agency's at-risk list.

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. A dashed outline shows where 5 or more lie within 170 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 51.5865, longitude -0.4923. 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; flood risk: Environment Agency, published 6 July 2026; 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 postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

UB9 4DQ14 at high riskUB9 6PG7 at high riskUB9 4AF3 at high riskUB9 4BS2 at high riskUB9 6LZ1 at high riskUB9 6PB1 at high riskUB9 4HE1 at high riskUB9 6LU1 at high riskUB9 6PD1 at high risk

Where the postcodes at high or medium risk lie together

  • 16 postcodes at high or medium risk, outlined on the map. UB9 4DQ, is the one with most homes and businesses at high risk.

What broadband can you get in UB9?

Ofcom reports on 425 of the 431 postcodes in UB9. At 255 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit255 of 425
Postcodes where every home can get superfast371 of 425

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 checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is UB9 at risk of flooding?

39 of the 431 postcodes in UB9 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 156 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 39 of 431 postcodes High: 31Medium: 125Low: 69Very low: 27

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 UB9?

Homes in UB9 sold for a typical £490,000 in the 12 months to August 2026, across 145 sales, up 4.3% on the 12 months before, HM Land Registry's figures show.

£490,000 typical price, the 12 months to August 2026
£470,000 12 months to August 2025
▲ up 4.3% on the 12 months before
  • Detached £732,500 18 sales
  • Semi-detached £525,000 62 sales
  • Terraced £479,000 34 sales
  • Flat or maisonette £320,000 31 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 UB9

Pick a sector, then a postcode. A sector is the district plus the next digit.

UB9 476 postcodesUB9 5153 postcodesUB9 6202 postcodes
UK postcode format explained

Places in UB9

Towns and villages with postcodes in UB9, and how many each has here.

Hillingdon postcodes,268

Who covers UB9

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

  • Beaconsfield224
  • Ruislip, Northwood and Pinner156
  • Uxbridge and South Ruislip49
  • Chesham and Amersham1
  • South West Hertfordshire1

Police force areas

  • Thames Valley225
  • Metropolitan Police205
  • Hertfordshire1

Next to UB9

UB8 postcode district UB10 postcode district All UB districts Hillingdon postcodes

"Next to" is by number: the districts before and after UB9 in the UB area.

Check a postcode

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