Sort by Most recent sale Address Highest price Highest £ per sqm Largest area Smallest area	Last sold	Price paid	Floor area (m²) Floor area (sq ft)	£ per m² £ per sq ft	Type	Sold	m² sq ft	£/m² £/sq ft
26, Harmer Green Lane, Welwyn, AL6 0AT	20 Aug 2025	£720,000 B	120 m² 1291 sqft	£6,000 £557	Detached (4 bed)
38, Harmer Green Lane, Welwyn, AL6 0AT -	31 Mar 2022	£1,775,000	266 m² 2863 sqft	£6,672 £619	Detached (5 bed)
44a, Harmer Green Lane, Welwyn, AL6 0AT -	16 Dec 2021	£960,000	161 m² 1732 sqft	£5,962 £553	Detached (5 bed)
40, Harmer Green Lane, Welwyn, AL6 0AT -	03 Dec 2021	£1,726,000	385 m² 4144 sqft	£4,483 £416	Detached (5 bed)
48a, Harmer Green Lane, Welwyn, AL6 0AT -	05 Oct 2018	£1,885,000	353 m² 3799 sqft	£5,339 £496	Detached (3 bed)
42, Harmer Green Lane, Welwyn, AL6 0AT -	12 Nov 2015	£1,150,000	244 m² 2626 sqft	£4,713 £437	Detached (5 bed)
32, Harmer Green Lane, Welwyn, AL6 0AT -	06 Feb 2012	£595,000	166 m² 1786 sqft	£3,584 £332	Detached (5 bed)
44, Harmer Green Lane, Welwyn, AL6 0AT -	23 Mar 2011	£845,000	173 m² 1862 sqft	£4,884 £453	Detached (4 bed)
36, Harmer Green Lane, Welwyn, AL6 0AT -	16 Jul 2010	£775,000			Detached (5 bed)
28, Harmer Green Lane, Welwyn, AL6 0AT -	06 Sep 2006	£510,000			Detached (4 bed)
46, Harmer Green Lane, Welwyn, AL6 0AT	15 Oct 1999	£500,000			Detached (5 bed)
52, Harmer Green Lane, Welwyn, AL6 0AT	18 Nov 1997	£365,000			Detached (5 bed)
26, Harmer Green Lane	£720,000 B Aug-2025	120 1291	6,000 557
38, Harmer Green Lane -	£1,775,000 Mar-2022	266 2863	6,672 619
44a, Harmer Green Lane -	£960,000 Dec-2021	161 1732	5,962 553
40, Harmer Green Lane -	£1,726,000 Dec-2021	385 4144	4,483 416
48a, Harmer Green Lane -	£1,885,000 Oct-2018	353 3799	5,339 496
42, Harmer Green Lane -	£1,150,000 Nov-2015	244 2626	4,713 437
32, Harmer Green Lane -	£595,000 Feb-2012	166 1786	3,584 332
44, Harmer Green Lane -	£845,000 Mar-2011	173 1862	4,884 453
36, Harmer Green Lane -	£775,000 Jul-2010
28, Harmer Green Lane -	£510,000 Sep-2006
46, Harmer Green Lane	£500,000 Oct-1999
52, Harmer Green Lane	£365,000 Nov-1997

The data above for Harmer Green Lane can be visualised as a scatter graph, this will show price trends over time.

The average price per square metre (per square foot) in Harmer Green Lane, Welwyn is £6,249 sqm (£580 per sq ft), this is based on the Land Registry sold price of the 8 most recent sales.
The majority of homes in Welwyn are now selling for between £4,990 and £6,420 per square metre (£463 and £596 per square foot) , find out more in this local analysis of AL6 0 (Welwyn) house prices.
There are roughly 37 homes on Harmer Green Lane, we would have expected roughly 5 sales each year given that in the UK people sell their homes on average once every 7 years.
In the last 4 years there have been 8 property sales in Harmer Green Lane, averaging about 2 home sales per year .
The average size of all the properties on Harmer Green Lane is 268 m2 (2,884 sqft).