18, Roundfield Avenue
18, Roundfield Avenue
Description & Estimates







18, Roundfield Avenue, Harpenden is described in the public record as a mid-century house with 968 ft2 of internal area.
Locally, houses of this size normally have 3 bedrooms with a garden.
Our estimate of the sale value of 18, Roundfield Avenue, Harpenden is £506,096 and its rental estimate is £2,233 per month, given the available information and assuming reasonable condition.
Roundfield Avenue, Harpenden, AL5 falls within the AL5 postal district, in the borough of St. Albans.
Our Data Sources
18, Roundfield Avenue, Harpenden has no records in the the Land Registry and a single entry in the EPC database dated January 2021.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 4 out of 5 and is considered of high 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 18, Roundfield Avenue, Harpenden, we estimate a market value of £531,401 and a rental value of £2,344 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £470,669 and £2,076 per month respectively.
Recent Market Change
Over the last year, 18, Roundfield Avenue, Harpenden has seen its estimated sale value grow by £2,026 (0.4%) and its estimated rental value climb by £75 per month (3.4%). This results in an estimated gross rental yield of 5.3%.
Energy Efficiency
18, Roundfield Avenue, Harpenden has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 07 Jan 2021.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Similar Properties Sold Nearby
Over the past 2 years 3 properties similar to 18, Roundfield Avenue, Harpenden have sold within a radius of 750 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 5th January 2026, was 14, Porters Hill, Harpenden, AL5 5JD, a freehold house which sold for £460,000.
Read more about house prices in AL5.
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Location Comparison
Of the 41 addresses on Roundfield Avenue, Harpenden, AL5, 18, Roundfield Avenue, Harpenden comes out as the 8th largest and the 29th most expensive in our analysis of the public data.
It is also £454k less expensive than the average property across the AL5 district.
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Schools Nearby
- 200mSauncey Wood Primary School
- 700mManland Primary School
- 1.1kmCrabtree Junior School
- 500mKatherine Warington School
- 700mSir John Lawes School
- 1.2kmSt George's School
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Public Transport Nearby
From 18, Roundfield Avenue, Harpenden, the nearest station is Harpenden, 1.5 kilometres away.
- 1.5kmHarpenden
- 6.6kmLuton Airport Parkway
- 8.2kmLuton
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.

