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
59, Sibley Avenue, Harpenden, AL5 1HF	04 Dec 2025	£1,100,000	113 m² 1216 sqft	£9,734 £904	Detached (4 bed)
28, Sibley Avenue, Harpenden, AL5 1HF -	05 Sep 2025	£793,650	138 m² 1485 sqft	£5,751 £534	Semi-D (3 bed)
57, Sibley Avenue, Harpenden, AL5 1HF	31 Mar 2025	£1,105,000	158 m² 1700 sqft	£6,993 £649	Detached (4 bed)
45, Sibley Avenue, Harpenden, AL5 1HF -	10 May 2024	£1,350,000	186 m² 2002 sqft	£7,258 £674	Detached (7 bed)
36, Sibley Avenue, Harpenden, AL5 1HF -	26 Oct 2023	£1,205,000	175 m² 1883 sqft	£6,885 £639	Detached (4 bed)
43, Sibley Avenue, Harpenden, AL5 1HF -	14 Jul 2023	£845,000	116 m² 1248 sqft	£7,284 £676	Detached (4 bed)
27, Sibley Avenue, Harpenden, AL5 1HF	15 Jun 2023	£500,000	95 m² 1022 sqft	£5,263 £488	Terrace (4 bed)
44, Sibley Avenue, Harpenden, AL5 1HF -	23 Sep 2022	£660,000	64 m² 688 sqft	£10,312 £958	Detached
26, Sibley Avenue, Harpenden, AL5 1HF -	21 Jun 2022	£945,000	142 m² 1528 sqft	£6,654 £618	Terrace (4 bed)
34, Sibley Avenue, Harpenden, AL5 1HF -	20 Apr 2022	£755,000	108 m² 1162 sqft	£6,990 £649	Semi-D (3 bed)
24, Sibley Avenue, Harpenden, AL5 1HF	26 May 2021	£710,000	140 m² 1506 sqft	£5,071 £471	Semi-D (4 bed)
20, Sibley Avenue, Harpenden, AL5 1HF -	18 Dec 2020	£750,000	146 m² 1571 sqft	£5,136 £477	Semi-D (2 bed)
31, Sibley Avenue, Harpenden, AL5 1HF -	23 Aug 2019	£756,000 B	155 m² 1668 sqft	£4,877 £453	Semi-D (4 bed)
40, Sibley Avenue, Harpenden, AL5 1HF	18 Dec 2018	£895,000	136 m² 1463 sqft	£6,580 £611	Detached (4 bed)
14a, Sibley Avenue, Harpenden, AL5 1HE -	28 Sep 2018	£685,000	108 m² 1162 sqft	£6,342 £589	Detached
22, Sibley Avenue, Harpenden, AL5 1HF -	20 Sep 2018	£585,000	65 m² 699 sqft	£9,000 £836	Semi-D (2 bed)
16, Sibley Avenue, Harpenden, AL5 1HF -	20 Jun 2018	£665,000	116 m² 1248 sqft	£5,732 £532	Detached (2 bed)
1, Sibley Avenue, Harpenden, AL5 1HE -	06 Oct 2017	£705,000	94 m² 1011 sqft	£7,500 £696	Detached (4 bed)
14, Sibley Avenue, Harpenden, AL5 1HE	30 Aug 2017	£700,000	107 m² 1151 sqft	£6,542 £607	Semi-D (2 bed)
15, Sibley Avenue, Harpenden, AL5 1HE -	21 Mar 2016	£427,000	59 m² 635 sqft	£7,237 £672	Semi-D (2 bed)
41, Sibley Avenue, Harpenden, AL5 1HF -	13 Aug 2014	£875,000	179 m² 1926 sqft	£4,888 £454	Detached (5 bed)
17, Sibley Avenue, Harpenden, AL5 1HE -	30 Jun 2014	£475,000	87 m² 936 sqft	£5,459 £507	Semi-D (2 bed)
8, Sibley Avenue, Harpenden, AL5 1HE -	29 May 2014	£650,000	108 m² 1162 sqft	£6,018 £559	Semi-D (4 bed)
10, Sibley Avenue, Harpenden, AL5 1HE -	31 Oct 2012	£590,000	130 m² 1399 sqft	£4,538 £421	Semi-D (4 bed)
9, Sibley Avenue, Harpenden, AL5 1HE -	03 Oct 2012	£453,100	98 m² 1054 sqft	£4,623 £429	Semi-D (3 bed)
6, Sibley Avenue, Harpenden, AL5 1HE -	15 Dec 2011	£412,000	107 m² 1151 sqft	£3,850 £357	Semi-D (3 bed)
18, Sibley Avenue, Harpenden, AL5 1HF -	29 Oct 2010	£452,000	116 m² 1248 sqft	£3,896 £361	Semi-D (4 bed)
51, Sibley Avenue, Harpenden, AL5 1HF -	14 Jul 2010	£650,000	163 m² 1754 sqft	£3,987 £370	Detached (5 bed)
19, Sibley Avenue, Harpenden, AL5 1HF -	30 Apr 2010	£425,000	75 m² 807 sqft	£5,666 £526	Detached (2 bed)
25, Sibley Avenue, Harpenden, AL5 1HF -	28 Aug 2007	£395,000			Semi-D (3 bed)
59, Sibley Avenue	£1,100,000 Dec-2025	113 1216	9,734 904
28, Sibley Avenue -	£793,650 Sep-2025	138 1485	5,751 534
57, Sibley Avenue	£1,105,000 Mar-2025	158 1700	6,993 649
45, Sibley Avenue -	£1,350,000 May-2024	186 2002	7,258 674
36, Sibley Avenue -	£1,205,000 Oct-2023	175 1883	6,885 639
43, Sibley Avenue -	£845,000 Jul-2023	116 1248	7,284 676
27, Sibley Avenue	£500,000 Jun-2023	95 1022	5,263 488
44, Sibley Avenue -	£660,000 Sep-2022	64 688	10,312 958
26, Sibley Avenue -	£945,000 Jun-2022	142 1528	6,654 618
34, Sibley Avenue -	£755,000 Apr-2022	108 1162	6,990 649
24, Sibley Avenue	£710,000 May-2021	140 1506	5,071 471
20, Sibley Avenue -	£750,000 Dec-2020	146 1571	5,136 477
31, Sibley Avenue -	£756,000 B Aug-2019	155 1668	4,877 453
40, Sibley Avenue	£895,000 Dec-2018	136 1463	6,580 611
14a, Sibley Avenue -	£685,000 Sep-2018	108 1162	6,342 589
22, Sibley Avenue -	£585,000 Sep-2018	65 699	9,000 836
16, Sibley Avenue -	£665,000 Jun-2018	116 1248	5,732 532
1, Sibley Avenue -	£705,000 Oct-2017	94 1011	7,500 696
14, Sibley Avenue	£700,000 Aug-2017	107 1151	6,542 607
15, Sibley Avenue -	£427,000 Mar-2016	59 635	7,237 672
41, Sibley Avenue -	£875,000 Aug-2014	179 1926	4,888 454
17, Sibley Avenue -	£475,000 Jun-2014	87 936	5,459 507
8, Sibley Avenue -	£650,000 May-2014	108 1162	6,018 559
10, Sibley Avenue -	£590,000 Oct-2012	130 1399	4,538 421
9, Sibley Avenue -	£453,100 Oct-2012	98 1054	4,623 429
6, Sibley Avenue -	£412,000 Dec-2011	107 1151	3,850 357
18, Sibley Avenue -	£452,000 Oct-2010	116 1248	3,896 361
51, Sibley Avenue -	£650,000 Jul-2010	163 1754	3,987 370
19, Sibley Avenue -	£425,000 Apr-2010	75 807	5,666 526
25, Sibley Avenue -	£395,000 Aug-2007

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

The average price per square metre (per square foot) in Sibley Avenue, Harpenden is £7,348 sqm (£682 per sq ft), this is calculated from sold property prices of the 9 most recent sales.
The majority of homes in Harpenden are now selling for between £5,930 and £7,680 per square metre (£550 and £713 per square foot) , find out more in this local analysis of AL5 1 (Harpenden) house prices.
There are roughly 41 homes on Sibley Avenue, we would have expected approximately 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 9 property sales in Sibley Avenue, averaging about 2 home sales per year .
The average size of all the properties on Sibley Avenue is 126 m2 (1,356 sqft).