Average price per square foot in SG3 (Knebworth) — July 2026
£497
avg £/sqft (indexed to today)
£450,000
median sold price
1048 sqft
average floor area
-7.6%
new-build premium (83 new-build sales)
£/sqft by property type
| Type | Avg £/sqft (today) | Median price | Sales |
|---|---|---|---|
| Detached | £527/sqft | £699,995 | 144 |
| Semi-detached | £493/sqft | £500,000 | 172 |
| Terraced | £506/sqft | £375,000 | 147 |
| Flat | £468/sqft | £280,000 | 162 |
Trend (raw sold £/sqft by year)
| Year | Avg £/sqft |
|---|---|
| 2023 | £484/sqft |
| 2024 | £476/sqft |
| 2025 | £466/sqft |
| 2026 | £483/sqft |
Appraising a site in SG3? Threshold turns this into comparables, a ground-pricing map, price prediction and a maximum land bid — one pin, under 60 seconds. Free 7-day trial →
Nearby districts: SG1 · SG11 · SG12 · SG13 · SG14 · SG15 · SG16 · SG17 · all areas
Method: Land Registry sales (2021–present) in postcode district SG3, matched to EPC floor areas, HPI-indexed to today, 2nd–98th percentile trimmed. Open Government Licence data (HM Land Registry, EPC Register, ONS, UK HPI). Estimates for research, not RICS valuations. Updated July 2026.