Our Data Sources
26, Mardley Avenue, Welwyn has no records in the the Land Registry and a single entry in the EPC database dated December 2013.
We combine this information with public data 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
Decorative condition can have a big effect on a property's value and this effect varies depending on the type, size and location of the property.
If 26, Mardley Avenue, Welwyn is in very good condition we estimate a sale value of £1,235,039 and a rental value of £3,594 per month.
However, if the property needs a lot of cosmetic work we estimate a sale value of £1,093,891 and a rental value of £3,183 per month.
Plot Size
According to data from HM Land Registry, 26, Mardley Avenue, Welwyn sits on a plot of 845 m2.
We have plot size data on 3 out of 3 other houses in the postcode and 26, Mardley Avenue, Welwyn sits on the 2nd largest plot.
Energy Efficiency
26, Mardley Avenue, Welwyn has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 26 Dec 2013.
The property is not connected to mains gas and has mostly double glazing. It is heated using Boiler and radiators, mains gas.
Similar Properties Sold Nearby
According to the Land Registry and our network of Estate Agents, there have been 44 sales of properties similar to 26, Mardley Avenue, Welwyn within a radius of 1.4 kilometres over the last 2 years.
The most recent example is Chestnut Lodge, Chestnut Walk, Welwyn, AL6 0SB, a freehold house which sold for £950,000 on the 27th March 2025.
Read more about house prices in AL6.
- Sold Mar 2025£950,000 | 5 Bed HouseChestnut Lodge, Chestnut Walk, Welwyn, AL6 0SBChestnut Lodge, Chestnut Walk, Welwyn, AL6 0SB
- Sold Oct 2024£1,050,000 | 4 Bed House18, Mardley Hill, Welwyn, AL6 0TN18, Mardley Hill, Welwyn, AL6 0TN
- Sold Aug 2021£996,500 | 5 Bed House4, Rosecroft Lane, Welwyn, AL6 0UB4, Rosecroft Lane, Welwyn, AL6 0UB
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Location Comparison
Mardley Avenue, Welwyn, AL6 has a total of 30 addresses. According to our analysis of all the public data, 26, Mardley Avenue, Welwyn is the 7th largest and the 2nd most expensive property on the street.
When compared to the postcode district it is £375k more expensive than the average property in AL6.
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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
According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.












