HouseMarketBook

AL9, Brookmans Park and Welham Green, Welwyn Hatfield

Postcode district in Welwyn Hatfield · 266 sales in the last 24 months, 212 with a floor area counted

Median price per square metre, last 24 months£5,660212 sales · £526 per sq ft · down 4.9% on a year ago

Prices per square metre in AL9 are down 4.9% on a year ago, at a median of £5,660 (£526 per sq ft).

Half of the 212 counted sales were between £4,630 and £6,440 per square metre, and the median price paid was £577,500. HM Land Registry records 5,742 sales in this postcode district since 1995.

Median price, 24 months£577,500
£ per m², middle half£4,630 to £6,440
Sales, 24 months266212 with a floor area counted
Typical floor area101 m²

By property type

TypeSales£ / m²Middle halfMedian price
Detached61£6,080£5,330–6,630£1,077,000
Flat or maisonette38£4,390£3,890–5,170£285,000
Semi-detached64£6,130£5,170–7,170£577,500
Terraced49£5,120£4,610–6,080£485,000
Counted sales over the last 24 months. A type needs 12 sales for a median; each type's median is what the fair-value check compares against in a sector.

The trend

Median £ per m² in AL9 by quarter, down 4.9% on a year ago
5,1605,6956,230£5,1602024 Q42026 Q3
Median £ per m² by year since 1995
9503,3155,680£5,68019952026
Each point is the median of the counted sales in that period. Older sales use the floor area on the latest certificate.

Busiest streets in AL9

By sales in the last 24 months
A street needs 12 counted sales for a median of its own; a dash means it has fewer.

Year by year

Counted sales
YearSalesMedian priceMedian £ / m²
202663£580,000£5,680
2025123£592,000£5,460
2024104£570,000£5,400
2023133£585,000£5,220
2022159£580,000£5,520
2021211£575,000£5,350
2020124£532,000£4,830
2019140£561,500£4,570
2018138£472,500£4,630
2017131£540,000£4,920
2016159£495,000£4,520
2015171£370,000£4,000
The last 12 years; the chart above runs from 1995.

Sales to September 2026 · HM Land Registry price paid data · MHCLG energy certificates · ONS postcode directory · medians of counted sales over 24 months · typical floor area 101 m² · change on a year ago −4.9% · An index-based comparison of sold prices, not a valuation.