Knebworth

Knebworth is covered by postcode district SG3. It is in the North Hertfordshire council area, Hertfordshire.

Typical price £418,500 Homes sold in Knebworth, last 12 months Gigabit broadband 80 of 96 postcodes where every home and business can get it Flooding Not on the at-risk list No postcode here has a home or business in an area at risk from rivers or the sea Schools 1 1 primary school at its postcodes

Every postcode in Knebworth, by flood risk

Map of every postcode in Knebworth, by flood risk Of the 98 postcodes in Knebworth that ONS places, 98 are not on the Environment Agency's at-risk list. Places named: Knebworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. SG3 6AA: not on the flood risk listSG3 6AB: not on the flood risk listSG3 6AD: not on the flood risk listSG3 6AE: not on the flood risk listSG3 6AH: not on the flood risk listSG3 6AJ: not on the flood risk listSG3 6AL: not on the flood risk listSG3 6AN: not on the flood risk listSG3 6AP: not on the flood risk listSG3 6AQ: not on the flood risk listSG3 6AR: not on the flood risk listSG3 6AS: not on the flood risk listSG3 6AT: not on the flood risk listSG3 6AU: not on the flood risk listSG3 6AW: not on the flood risk listSG3 6AX: not on the flood risk listSG3 6AY: not on the flood risk listSG3 6AZ: not on the flood risk listSG3 6BA: not on the flood risk listSG3 6BB: not on the flood risk listSG3 6BD: not on the flood risk listSG3 6BE: not on the flood risk listSG3 6BG: not on the flood risk listSG3 6BH: not on the flood risk listSG3 6BJ: not on the flood risk listSG3 6BL: not on the flood risk listSG3 6BN: not on the flood risk listSG3 6BP: not on the flood risk listSG3 6BQ: not on the flood risk listSG3 6BS: not on the flood risk listSG3 6BT: not on the flood risk listSG3 6BU: not on the flood risk listSG3 6BW: not on the flood risk listSG3 6BX: not on the flood risk listSG3 6BY: not on the flood risk listSG3 6BZ: not on the flood risk listSG3 6DA: not on the flood risk listSG3 6DB: not on the flood risk listSG3 6DD: not on the flood risk listSG3 6DE: not on the flood risk listSG3 6DF: not on the flood risk listSG3 6DG: not on the flood risk listSG3 6DH: not on the flood risk listSG3 6DJ: not on the flood risk listSG3 6DN: not on the flood risk listSG3 6DP: not on the flood risk listSG3 6DQ: not on the flood risk listSG3 6DR: not on the flood risk listSG3 6DS: not on the flood risk listSG3 6DT: not on the flood risk listSG3 6DU: not on the flood risk listSG3 6DX: not on the flood risk listSG3 6DY: not on the flood risk listSG3 6DZ: not on the flood risk listSG3 6EA: not on the flood risk listSG3 6EB: not on the flood risk listSG3 6ED: not on the flood risk listSG3 6EE: not on the flood risk listSG3 6EH: not on the flood risk listSG3 6EL: not on the flood risk listSG3 6EN: not on the flood risk listSG3 6EP: not on the flood risk listSG3 6EQ: not on the flood risk listSG3 6ER: not on the flood risk listSG3 6EU: not on the flood risk listSG3 6EW: not on the flood risk listSG3 6EX: not on the flood risk listSG3 6EY: not on the flood risk listSG3 6FQ: not on the flood risk listSG3 6HB: not on the flood risk listSG3 6HE: not on the flood risk listSG3 6HF: not on the flood risk listSG3 6HG: not on the flood risk listSG3 6HH: not on the flood risk listSG3 6HJ: not on the flood risk listSG3 6HL: not on the flood risk listSG3 6HP: not on the flood risk listSG3 6NA: not on the flood risk listSG3 6ND: not on the flood risk listSG3 6NL: not on the flood risk listSG3 6NN: not on the flood risk listSG3 6NP: not on the flood risk listSG3 6NS: not on the flood risk listSG3 6NU: not on the flood risk listSG3 6NX: not on the flood risk listSG3 6PB: not on the flood risk listSG3 6PD: not on the flood risk listSG3 6PE: not on the flood risk listSG3 6PF: not on the flood risk listSG3 6PG: not on the flood risk listSG3 6PH: not on the flood risk listSG3 6PL: not on the flood risk listSG3 6PU: not on the flood risk listSG3 6PW: not on the flood risk listSG3 6QX: not on the flood risk listSG3 6RF: not on the flood risk list Knebworth Map of every postcode in Knebworth, by flood risk Of the 98 postcodes in Knebworth that ONS places, 98 are not on the Environment Agency's at-risk list. Places named: Knebworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Knebworth
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 98

Of the 98 postcodes in Knebworth that ONS places, 98 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. 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 51.8652, longitude -0.1869. Open this area on OpenStreetMap

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Environment Agency flood risk, published 6 July 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

What is it like to live in Knebworth?

Homes sold for a typical £418,500 in the 12 months to September 2026. At 80 of the 96 postcodes Ofcom reports on, every home and business can get gigabit broadband. None of its 98 postcodes is on the Environment Agency's list of those with a home or business at risk of flooding from rivers or the sea. It has 1 primary school at its postcodes. One GP practice is at its postcodes. The nearest railway station is Knebworth, 200 metres from the middle of its postcodes in a straight line.

We don't rate places; here are the figures so you can judge.

Sources: HM Land Registry Price Paid Data; Ofcom Connected Nations; Environment Agency flood risk; Get Information about Schools; NHS GP practices; NaPTAN. Each figure is from a section of this page, which gives its date.

What do homes cost in Knebworth?

Homes in Knebworth sold for a typical £418,500 in the 12 months to September 2026, across 58 sales, HM Land Registry's figures show. The 12 months before gave £465,000 from 65 sales: not a change larger than chance would explain, given which homes happened to sell.

£418,500 typical price, the 12 months to September 2026
£465,000 12 months to September 2025
  • Detached £846,500 11 sales
  • Semi-detached £562,500 14 sales
  • Terraced £347,500 14 sales
  • Flat or maisonette £280,000 19 sales

Each bar is that kind's typical price, against the most expensive kind here.

Across the whole SG3 district, Knebworth's main postcode district: a typical £462,500.

Sales at the postcodes ONS places in Knebworth: 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 October 2026.

Are new homes being built in Knebworth?

5 of the 98 postcodes now in use in Knebworth came into use in January 2020 or later, ONS says. In the 12 months to September 2025, 0 of the 65 homes sold in Knebworth were newly built (0%), HM Land Registry's records show; across the SG3 district, 24%.

The newest postcodes

SG3 6YYsince May 2023SG3 6HLsince November 2021SG3 6FQsince February 2021SG3 6EWsince November 2020SG3 6EUsince September 2020

A new postcode is often a new street or estate, but Royal Mail also makes new postcodes when it reorganises old ones, so not every one means new homes. Only postcodes still in use are counted.

New homes among the homes sold

PeriodIn KnebworthAcross the SG3 district
The 12 months to September 2026 0 of 58 (0%) 2 of 93 (2%)
The 12 months to September 2025 0 of 65 (0%) 40 of 164 (24%)

Standard sales of homes at market value that HM Land Registry marks as newly built. New homes take longer to be registered than other sales, so the latest 12 months count fewer of them than were sold. A share is given from 5 sales or more.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; HM Land Registry Price Paid Data, files dated 28 October 2026.

What broadband can you get in Knebworth?

Ofcom reports on 96 of the 98 postcodes in Knebworth. At 80 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit80 of 96
Postcodes where every home can get superfast96 of 96

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, Connected Nations, Spring 2026, data for January 2026.

Is Knebworth at risk of flooding?

None of the 98 postcodes in Knebworth is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea.

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 flood risk, published 6 July 2026.

Which schools are in Knebworth?

The primary schools are at the postcodes in Knebworth. There is no secondary school at its postcodes; these are the nearest to its middle. Distances are straight lines from the middle of its postcodes. Distance is not a catchment: each council sets its own admission rules. Special schools and alternative provision, which children join by referral, are not listed.

Primary

Secondary

Find and compare schools in England, on GOV.UK

Source: Get Information about Schools, read 17 October 2026. Each school opens its own record there.

How far is the station from Knebworth?

The nearest railway station to the centre point of the postcodes in Knebworth is Knebworth Rail Station, 200 m away in a straight line.

  • Knebworth Rail Station Railway station 200 mWalk
  • Stevenage Rail Station Railway station 4.3 kmCycle
  • Welwyn North Rail Station Railway station 4.7 kmCycle

Straight-line distances from the centre point, not routes. Walk: under 1.2 km. Cycle: 1.2 to 5 km. Drive: further.

Straight-line distances from the middle of the postcodes, not routes. Each postcode page lists its own nearest stations and bus stops. The Department for Transport's register does not say how often services run.

Source: NaPTAN, read 17 October 2026.

Which GP surgeries are in Knebworth?

The GP practices at the postcodes in Knebworth. Each practice sets the area it takes patients from, so check with it before registering.

  • Knebworth & Marymead Practice Phone 01438 812494 450 mWalk
Find a GP on the NHS website

Source: NHS GP practices, read 17 October 2026.

Is Knebworth safe? Crime recorded around it

Police.uk records 383 crimes and reports of anti-social behaviour within a mile of the middle of the postcodes in Knebworth over the 12 months from September 2025 to August 2026. August 2026 is the latest month it has published. These are counts, not a rate: we hold no count of the people who live, work or pass through, so we do not say whether a place is safe.

Each month, September 2025 to August 2026

  1. 35 September 2025
  2. 34 October 2025
  3. 32 November 2025
  4. 35 December 2025
  5. 20 January 2026
  6. 22 February 2026
  7. 33 March 2026
  8. 37 April 2026
  9. 26 May 2026
  10. 29 June 2026
  11. 53 July 2026
  12. 27 August 2026

By kind, over the 12 months

Violence and sexual offences142 reports
Anti-social behaviour84 reports
Shoplifting31 reports
Public order26 reports
Criminal damage and arson24 reports
Vehicle crime22 reports
Burglary15 reports
Other theft15 reports

Also: other crime 11, drugs 7, theft from the person 2, possession of weapons 2, bicycle theft 1, robbery 1.

Police.uk says its locations "always represent the approximate location of a crime". Each crime is moved to the nearest of a fixed list of map points, each over a street centre, a public place or a commercial premises, chosen so that every point covers at least eight addresses or none. A mile is a wide circle: in a town it takes in the centre and its shops, where much crime is recorded.

Crime around one postcode

Source: police.uk, data to August 2026, from its download of 30 September 2026.

Who runs Knebworth?

District, borough or city council
North Hertfordshire
County council
Hertfordshire
Parliamentary constituency
Stevenage
Police force area
Hertfordshire
Region
East of England
Country
England
MP
Kevin Bonavia (Labour)

All 98 postcodes here share these. Wards differ: check a postcode for yours. What council am I in?

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; UK Parliament, read 14 October 2026.

Moving to Knebworth

Who to tell and what to sort out in your first week.

Who to tell when moving house: the full list Moving house checklist

Knebworth postcodes

98 postcodes in use in Knebworth, by district:

SG3 postcode district,98 postcodes

That district is in the SG postcode area.

Check a Knebworth postcode

Enter a full postcode to see its ward, its flood risk, house prices in its sector and its nearest schools.

Do not know the postcode? What is my postcode?

Places near Knebworth

With the typical price of a home in each, to set beside Knebworth's £418,500. Distances are straight lines between the middles of each place's postcodes.

Woolmer Green2.2 km, £660,000Codicote3.8 km, £377,500Welwyn4.4 km, £470,000Stevenage4.6 km, £350,000Welwyn Garden City7.2 km, £420,000Wheathampstead9.5 km, £600,000Hertford10.5 km, £425,000Hitchin11.2 km, £450,000 All places A to Z

Quick answers about Knebworth

What is the postcode for Knebworth?
Postcode district SG3, with 98 postcodes in use. Source: ONS.
Which council is Knebworth in?
North Hertfordshire, with Hertfordshire as its county council. Source: ONS.
Who is the MP for Knebworth?
Kevin Bonavia (Labour), for Stevenage. Source: UK Parliament and ONS.
How much are houses in Knebworth?
A typical £418,500 in the 12 months to September 2026, from 58 sales. Source: HM Land Registry.
What schools are in Knebworth?
Primary schools at its postcodes include Knebworth Primary and Nursery School; the nearest secondary school to the middle of its postcodes is Barnwell School, 2.8 km away. Source: Department for Education.
Does Knebworth have a railway station?
Yes: Knebworth station, 200 metres from the middle of its postcodes in a straight line. Source: Department for Transport.
What broadband can you get in Knebworth?
Ofcom reports on 96 of the 98 postcodes in Knebworth. At 80 of them every home and business can get gigabit broadband. Source: Ofcom.
Is Knebworth at risk of flooding?
None of the 98 postcodes in Knebworth is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea. River and sea risk for the land, not surface water. Source: Environment Agency.
Are new homes being built in Knebworth?
5 of the 98 postcodes now in use in Knebworth came into use in January 2020 or later, ONS says. In the 12 months to September 2025, 0 of the 65 homes sold in Knebworth were newly built (0%), HM Land Registry's records show; across the SG3 district, 24%. Source: ONS and HM Land Registry.

Where the facts on this page come from

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. Contains Parliamentary information licensed under the Open Parliament Licence v3.0.

Licences: Open Government Licence v3.0; Open Parliament Licence v3.0.

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