Our Data Sources
20, Sibley Avenue, Harpenden has a single entry in the Land Registry from December 2020 and a single entry in the EPC database dated August 2020.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 4 out of 5 and is considered of high accuracy.
Price Range & Condition
In very good condition, we estimate 20, Sibley Avenue, Harpenden would be worth £1,070,458, with a potential rental value of £3,575 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £948,120, with a rental value of £3,166 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Energy Efficiency
20, Sibley Avenue, Harpenden has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 21 Aug 2020.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
20, Sibley Avenue, Harpenden last changed hands on 18th December 2020, selling for £750,000. The transaction was logged as a freehold house by HM Land Registry.
That is its only recorded sale since 1995.
The market for similar properties has risen by 23.1% since December 2020.
- Sold Dec 2020£750,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 141 sales of comparable properties within 730 metres of 20, Sibley Avenue, Harpenden across the last 2 years.
Most recently, 28, Sibley Avenue, Harpenden, AL5 1HF, a freehold house, sold at £793,650 on the 5th September 2025.
Read more about house prices in AL5.
- Sold Sep 2025£793,650 | 4 Bed House28, Sibley Avenue, Harpenden, AL5 1HF28, Sibley Avenue, Harpenden, AL5 1HF
- Sold Aug 2025£1,095,000 | 4 Bed House16, Grove Avenue, Harpenden, AL5 1EX16, Grove Avenue, Harpenden, AL5 1EX
- Sold May 2021£710,000 | 4 Bed House24, Sibley Avenue, Harpenden, AL5 1HF24, Sibley Avenue, Harpenden, AL5 1HF
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks 20, Sibley Avenue, Harpenden as the 11th largest and the 11th most expensive of the 53 addresses on Sibley Avenue, Harpenden, AL5.
Against the AL5 postcode district average, it is £53k more expensive than the typical property.
More reading links
Schools Nearby
- The Grove Infant and Nursery School300 m away
- The Grove Junior School400 m away
- High Beeches Primary School800 m away
- Katherine Warington School1.8 km away
- Sir John Lawes School2.0 km away
- St George's School2.3 km away
More reading links
Public Transport Nearby
- Harpenden|1.6 km away
- St Albans City|6.3 km away
- St Albans Abbey|6.9 km away
Available Internet Speeds
Ofcom's latest figures show ultrafast broadband available in this area.
According to recent data from Ofcom, Ultrafast Broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
