Our Data Sources
31, Mardley Avenue, Welwyn has no recent1 records in the the Land Registry and a single entry in the EPC database dated July 2014.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 3 out of 5 and is considered of medium accuracy.
Price Range & Condition
In very good condition, we estimate 31, Mardley Avenue, Welwyn would be worth £1,055,343, with a potential rental value of £4,175 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £934,732, with a rental value of £3,698 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
31, Mardley Avenue, Welwyn occupies a 537 m2 plot as recorded by HM Land Registry.
Of the 14 other houses in this postcode, 12 have recorded plot sizes, and this one ranks as the 6th largest.
Energy Efficiency
31, Mardley Avenue, Welwyn has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 24 Jul 2014.
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
31, Mardley Avenue, Welwyn last changed hands on 26th October 2001, selling for £500,000. The transaction was logged as a freehold house by HM Land Registry.
That is its only recorded sale since 1995.
- Sold Oct 2001£500,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 17 sales of comparable properties within 1.3 kilometres of 31, Mardley Avenue, Welwyn across the last 2 years.
Most recently, 6, Firway, Welwyn, AL6 0RD, a freehold house, sold at £1,190,000 on the 8th July 2025.
Read more about house prices in AL6.
- Sold Jul 2025£1,190,000 | 5 Bed House6, Firway, Welwyn, AL6 0RD6, Firway, Welwyn, AL6 0RD
- Sold May 2024£1,000,000 | 5 Bed House39, Mardley Avenue, Welwyn, AL6 0TU39, Mardley Avenue, Welwyn, AL6 0TU
- Sold Nov 2022£1,250,000 | 5 Bed House3, Heathbrow Road, Welwyn, AL6 0QG3, Heathbrow Road, Welwyn, AL6 0QG
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Location Comparison
Our analysis of the public data ranks 31, Mardley Avenue, Welwyn as the largest and the 3rd most expensive of the 30 addresses on Mardley Avenue, Welwyn, AL6.
Against the AL6 postcode district average, it is £204k more expensive than the typical property.
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Schools Nearby
- St Michael's Woolmer Green CofE VA Primary School600 m away
- Oaklands Primary School900 m away
- All Saints Church of England Voluntary Aided Primary School, Datchworth2.0 km away
- Monk's Walk School3.4 km away
- Ridgeway Academy4.9 km away
- Barnwell School5.0 km away
More reading links
Public Transport Nearby
- Knebworth|2.3 km away
- Welwyn North|2.5 km away
- Watton-at-Stone|4.7 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.
