SG3 6QJ

Key Postcode Insights

SG3 6QJ is a residential postcode situated on Nup End, Old Knebworth, Knebworth, SG3 with 12 addresses.

It ranks as the 102nd largest and 40th most expensive of the 199 postcodes in the SG3 area. The dominant property type is a modern flat built after 1980.

The postcode contains a total of 12 properties: 4 houses and 8 flats.

12
Properties
  • Houses
  • Flats

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House Pricesin SG3 6QJ

Sale prices range from £239,389 for 2 bedroom Leasehold flats (678 ft2) to £1,019,023 for 5 bedroom freehold houses with a garden (2,249 ft2) .

Monthly rental prices range from £1,250 pcm for 2 bed flats to £2,959 pcm for 5 bed houses.

The gross rental yield is between 3.5% and 6.3%.

The average value per square foot is £400.

Average Sale Value
£509,979
Average Rental Value
£1,836 pcm
Average Rental Yield
4.3% /year
Average Value Per Sqft
£400 /ft2
Prices last updated 1st May 2026
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Sales History
in SG3 6QJ

The last sale was on 30th April 2025 for £690,000 and since then the market in the area has decreased by 0.5%. The postcode has had a total of 2 sales since 1995.

SG3 6QJ has seen 1 sale in the last three years and no sales in the last twelve months.

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Nearby Postcodesto SG3 6QJ

SG3 6QJ is the 102nd largest and the 40th most expensive postcode out of the 199 postcodes in the SG3 area.

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Property Typesin SG3 6QJ

  • 8 modern flats built after 1980
  • 1 mid-century house built between 1936 and 1979
  • 1 house of an unknown age
  • 2 other addresses of unknown type
  • modern flat (8)
  • mid-century house (1)
  • house (1)
  • Unknown (2)
Energy Efficiency

Energy Efficiencyof properties in SG3 6QJ

  • Energy Performance Certificate (EPC) surveys conducted for 5 properties.
  • The dominant rating is D.
  • A (0)
  • E (2)
  • B (0)
  • F (0)
  • C (1)
  • G (0)
  • D (2)
  • No EPC (7)
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Schools Nearby

Schools Nearbyto SG3 6QJ

The nearest primary school to SG3 6QJ is Codicote Church of England Primary School which is 2.1 kilometres away.
  • 2.1
    km
    Codicote Church of England Primary School
  • 2.7
    km
    Knebworth Primary and Nursery School
  • 3.0
    km
    Oaklands Primary School
The nearest secondary school is Barnwell School which is 4.4 kilometres away.
  • 4.4
    km
    Barnwell School
  • 4.9
    km
    Monk's Walk School
  • 5.4
    km
    Marriotts School
More reading links
Source: Ofsted 2026
Public Transport Nearby

Public Transport Nearbyto SG3 6QJ

The closest station to SG3 6QJ is Knebworth station which is 2.4 kilometres away.

  • 2.4
    km
    Knebworth
  • 4.4
    km
    Stevenage
  • 4.9
    km
    Welwyn North
  • 7.0
    km
    Watton-at-Stone
Source: National Rail
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