SG3, Knebworth house prices & rental yield

Postcode district in Knebworth, part of the SG postcode area

General / family area · 12.6km from University of Hertfordshire

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Looking for a property valuation in SG3? The average asking price above is a guide for the area as a whole, not a valuation of your specific property — a local estate agent or RICS surveyor can give you an accurate figure for that.

Average asking price
£520k
UK avg £340k
Average rent (pcm)
£1,850
UK avg £1,275
Gross rental yield
4.3%
5% below UK avg
Net yield (estimated)
3.2%
assumes ~25% costs, excl. mortgage
Crimes reported (2026-08)
20
81% below UK avg
Short-term let activity (North Hertfordshire)
#276 of 318

Summary

SG3 has a gross rental yield of 4.3%, 5% below the UK average, ranking #7 of 15 SG postcode districts by yield.

Gross yield trend

+1.2pp since Jul
Jul: 3.3% 3.3% Jul Aug: 3.4% 3.4% Aug Sep: 4.0% 4.0% Sep Oct: 4.5% 4.5% Oct

Buy-to-let calculator

Stamp Duty (SDLT)—
Deposit required—
Mortgage payment (monthly)—
Letting agent fee (monthly)—
Est. net monthly cashflow—

Estimate only, for England/Northern Ireland SDLT rates. Assumes an interest-only mortgage and doesn't account for insurance, maintenance, voids, or other running costs. Not financial advice.

SG3 by bedroom count

BedroomsAvg buyAvg rentYieldSampled
Studio £400k — — 1 / 0
1 £254k £1,375 — 14 / 3
2 £350k — — 17 / 0
3 £595k £1,875 — 15 / 2
4 £762k £6,120 — 18 / 2
5+ £1.45m — — 12 / 0

Nearby SG postcode districts, by yield

DistrictAvg buyAvg rentYield
SG6 £325k £1,425 5.3% Compare
SG1 £325k £1,370 5.1% Compare
SG13 £475k £2,000 5.1% Compare
SG2 £390k £1,600 4.9% Compare
SG18 £375k £1,350 4.3% Compare
SG5 £450k £1,605 4.3% Compare
SG16 £415k £1,425 4.1% Compare
SG14 £450k £1,500 4.0% Compare
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