Our Data Sources
6, Mardley Avenue, Welwyn has 2 entries in the Land Registry , most recently in October 2014 and a single entry in the EPC database dated October 2013.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 1 out of 5 and is considered of low accuracy.
Price Range & Condition
In very good condition, we estimate 6, Mardley Avenue, Welwyn would be worth £768,378, with a potential rental value of £2,979 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £680,563, with a rental value of £2,638 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
6, Mardley Avenue, Welwyn occupies a 561 m2 plot as recorded by HM Land Registry.
Of the 13 other houses in this postcode, 12 have recorded plot sizes, and this one ranks as the 9th largest.
Energy Efficiency
6, Mardley Avenue, Welwyn has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 23 Oct 2013.
The property is not connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
6, Mardley Avenue, Welwyn last changed hands on 13th October 2014, selling for £625,000. The transaction was logged as a freehold house by HM Land Registry.
In total it has sold twice since 1995.
The market for similar properties has risen by 48.2% since October 2014.
- Sold Oct 2014£625,000
- Sold Jun 2009£289,950
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 128 sales of comparable properties within 1.2 kilometres of 6, Mardley Avenue, Welwyn across the last 2 years.
Most recently, 50, Robbery Bottom Lane, Welwyn, AL6 0UN, a freehold house, sold at £658,000 on the 9th January 2026.
Read more about house prices in AL6.
- Sold Jan 2026£658,000 | 4 Bed House50, Robbery Bottom Lane, Welwyn, AL6 0UN50, Robbery Bottom Lane, Welwyn, AL6 0UN
- Sold Jan 2025£750,000 | 4 Bed House17, Mardley Avenue, Welwyn, AL6 0TU17, Mardley Avenue, Welwyn, AL6 0TU
- Sold May 2024£720,000 | 4 Bed House27, Marlborough Close, Welwyn, AL6 0UG27, Marlborough Close, Welwyn, AL6 0UG
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks 6, Mardley Avenue, Welwyn as the 9th largest and the 14th most expensive of the 30 addresses on Mardley Avenue, Welwyn, AL6.
Against the AL6 postcode district average, it is £69k less expensive than the typical property.
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Schools Nearby
- St Michael's Woolmer Green CofE VA Primary School700 m away
- Oaklands Primary School800 m away
- All Saints Church of England Voluntary Aided Primary School, Datchworth2.1 km away
- Monk's Walk School3.3 km away
- Ridgeway Academy4.9 km away
- Barnwell School5.0 km away
More reading links
Public Transport Nearby
- Knebworth|2.4 km away
- Welwyn North|2.5 km away
- Watton-at-Stone|4.8 km away
Available Internet Speeds
Ofcom's latest figures show superfast broadband available in this area.
According to recent data from Ofcom, Superfast Broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
