21 Frognal Avenue, Harrow, HA1 2SG is a leasehold terraced property built between 1930-1949. The property offers approximately 463 square feet of living space and is situated on the 1st floor of a 1-storey building. In this location, properties of similar size usually have one bedroom.

The estimated current market value of the property is £329,758 , which equates to approximately £712 per square foot. It was last sold on 5 Feb 2014 for £202,500. Since then, the value has increased by £127,258, representing a 62.8% increase, or approximately 5.1% per year.

The current estimated value of £329,758 is:

  • 12.8% lower than the average property price on Frognal Avenue
  • 7.3% lower than the average in the HA1 2SG postcode area
  • and 38.3% lower than the average price for Harrow as a whole

At the most recent EPC inspection on 27 April 2026, the property was recorded as rented.

View sold house prices in HA1 2SG

Building approximate location

About Property

Type
Flat
Built
1930-1949
Interior Size
463 sq ft
Tenure
Leasehold
Floor level
1st floor of 1
Price (estimate)
£329,758
Price Per sq ft (estimate)
£712
Bedroom Count (estimate)
1 bedroom

EPC Summary

21 Frognal Avenue, Harrow, Greater London, HA1 2SG has an Energy Performance Certificate (EPC) rating of C, based on the latest assessment carried out on 27 Apr 2026.

This property uses a gas-fired boiler and radiators, connected to the mains gas supply, as its main heating source. Hot water is provided from main heating system. The windows are fully double glazed.

The previous EPC assessment was conducted on 19 Nov 2013, when the property was rated D. Since then, the rating has improved to C, with the energy efficiency score increasing by 20.3%.

Since the previous assessment, several changes were observed:

  • The lighting was changed from low energy lighting in 83% of fixed outlets to excellent lighting efficiency, with no change in efficiency (very good).
Heating Type
Boiler and radiators, mains gas
Good
Hot Water
From main system
Good
Walls
Solid brick, as built, no insulation (assumed)
Very Poor
Windows
Fully double glazed
Poor
Lighting
Excellent lighting efficiency
Very Good

Compared to HA1 2SG

10 th / 21
Price Rank
7% lower than average
14 th / 15
Size Rank
31% smaller than average
1 st / 15
Price Per Sq FT Rank
35% higher than average

Sale History

Today
£329,758
streetscan.co.uk estimate
+63 %
5 Feb 2014
£202,500
Leasehold
+197.8 %
18 Nov 1998
£68,000
Leasehold
+94.3 %
15 May 1998
£35,000
Leasehold

Flood Risk for this Property

Flood risk from rivers and the sea
Very low flood risk
Flood risk from surface water
High flood risk
Surface water flood hazard
High

* Results are based on Environment Agency flood risk mapping for the property UPRN where available. They are indicative and should not be treated as a site-specific flood survey.

Flood risk from rivers and the sea

This property has very low flood risk from rivers and the sea.

River and sea flooding includes flooding caused by overflowing rivers, estuaries, tidal waters and coastal surges.

Flood risk from surface water

This property has high surface water flood risk.

Surface water flooding can happen when heavy rainfall overwhelms drains, roads, gardens or other hard surfaces.

Flood depth indicators

Rivers and Sea
  • 0.2m depth No mapped risk
  • 0.3m depth No mapped risk
  • 0.6m depth No mapped risk
  • 0.9m depth No mapped risk
  • 1.2m depth No mapped risk
Surface Water
  • 0.2m depth Medium
  • 0.3m depth Very low
  • 0.6m depth Very low
  • 0.9m depth Very low
  • 1.2m depth Very low

Area Insights

Nearby Properties

rooms: 3
size: 624 sq ft
sale price: £154,000
sale date: 21 Dec 2011
rooms: 2
size: 512 sq ft
sale price: £243,000
sale date: 27 Nov 2019
rooms: 2
size: 549 sq ft
sale price: £239,950
sale date: 12 Sep 2014
rooms: 3
size: 560 sq ft
sale price: £157,700
sale date: 15 Dec 2023
rooms: 3
size: 505 sq ft
sale price: £250,000
sale date: 8 Dec 2017

Data Sources

The property at 21 Frognal Avenue, Harrow, HA1 2SG appears three times in HM Land Registry records, with the latest transaction recorded on 5 Feb 2014. It also has two Energy Performance Certificate (EPC) records, the earliest dating back to 27 Apr 2026. We use this information to estimate the property's characteristics, flood risk profile and current market value.

This website uses public sector information from:

These datasets are licensed under the Open Government Licence v3.0 .

StreetScan.co.uk is not affiliated with, endorsed by, or associated with HM Land Registry, DESNZ, MHCLG, Defra or the Environment Agency.


Disclaimer: StreetScan.co.uk makes all reasonable efforts to ensure that the information provided on this website is current and accurate. However, no warranties or representations are made regarding its completeness, accuracy, suitability or reliability. Property values, flood risk assessments and other derived information are estimates based on publicly available datasets and should not be relied upon as professional, legal, surveying, environmental, financial or insurance advice. StreetScan.co.uk expressly disclaims all liability for any loss, damage, cost or expense arising directly or indirectly from the use of, or reliance upon, information provided on this website.