Our Data Sources
28, Mardley Avenue, Welwyn has 21 entries in the Land Registry , most recently in October 2022 and a single entry in the EPC database dated July 2021.
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 28, Mardley Avenue, Welwyn would be worth £1,000,606, with a potential rental value of £3,058 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £886,251, with a rental value of £2,708 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
28, Mardley Avenue, Welwyn occupies a 1,036 m2 plot as recorded by HM Land Registry.
All 3 other houses in this postcode have recorded plot sizes, and this one ranks as the largest.
Energy Efficiency
28, Mardley Avenue, Welwyn has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 19 Jul 2021.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
28, Mardley Avenue, Welwyn last changed hands on 14th October 2022, selling for £1,000,000. 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 3.4% since October 2022.
- Sold Oct 2022£1,000,000
- Sold Dec 2000£295,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 50 sales of comparable properties within 1.4 kilometres of 28, Mardley Avenue, Welwyn across the last 2 years.
Most recently, 49, Mardley Hill, Welwyn, AL6 0TT, a freehold house, sold at £950,000 on the 2nd September 2025.
Read more about house prices in AL6.
- Sold Sep 2025£950,000 | 4 Bed House49, Mardley Hill, Welwyn, AL6 0TT49, Mardley Hill, Welwyn, AL6 0TT
- Sold Apr 2021£755,000 | 4 Bed House10, Woodland Way, Welwyn, AL6 0RZ10, Woodland Way, Welwyn, AL6 0RZ
- Sold Mar 2021£780,000 | 4 Bed House8A, Woodland Way, Welwyn, AL6 0RZ8A, Woodland Way, Welwyn, AL6 0RZ
•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 28, Mardley Avenue, Welwyn as the 18th largest and the 6th most expensive of the 30 addresses on Mardley Avenue, Welwyn, AL6.
Against the AL6 postcode district average, it is £152k 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|2.4 km away
- Welwyn North|2.5 km away
- Watton-at-Stone|4.6 km away
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
