Our Data Sources
23, Mardley Avenue, Welwyn has no recent1 records in the the Land Registry and a single entry in the EPC database dated August 2025.
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
The condition of a property plays an important role in determining its value, with the degree of impact varying by property type, size and location.
For 23, Mardley Avenue, Welwyn, we estimate a market value of £862,898 and a rental value of £3,414 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £764,281 and £3,024 per month respectively.
Plot Size
HM Land Registry records the plot of land for 23, Mardley Avenue, Welwyn as measuring 519 m2.
That makes it the 7th largest plot in the postcode, where 12 of the 14 other houses have recorded plot data.
Energy Efficiency
23, Mardley Avenue, Welwyn has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 12 Aug 2025.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
The most recent sale of 23, Mardley Avenue, Welwyn completed on 24th March 2000 at £195,000 and was recorded by HM Land Registry as a freehold house.
Since 1995 this is the property's only sale.
- Sold Mar 2000£195,000
Similar Properties Sold Nearby
Over the past 2 years 80 properties similar to 23, Mardley Avenue, Welwyn have sold within a radius of 1.3 kilometres, per the Land Registry and our network of Estate Agents.
The latest, on the 30th May 2025, was 16, Marlborough Close, Welwyn, AL6 0UG, a freehold house which sold for £675,000.
Read more about house prices in AL6.
- Sold May 2025£675,000 | 5 Bed House16, Marlborough Close, Welwyn, AL6 0UG16, Marlborough Close, Welwyn, AL6 0UG
- Sold Dec 2024£778,000 | 4 Bed House13, Hillside Way, Welwyn, AL6 0TY13, Hillside Way, Welwyn, AL6 0TY
- Sold Jan 2022£850,000 | 4 Bed House20, Hillside Way, Welwyn, AL6 0TY20, Hillside Way, Welwyn, AL6 0TY
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Of the 30 addresses on Mardley Avenue, Welwyn, AL6, 23, Mardley Avenue, Welwyn comes out as the 5th largest and the 11th most expensive in our analysis of the public data.
It is also £21k more expensive than the average property across the AL6 district.
More reading links
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
Broadband here reaches superfast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Superfast Broadband is available in the area.
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
