12, Observatory Road, SW14 7QD

12 Observatory Road is a 160 m² / 1,722 sq ft terraced home in Mortlake. It sold for £1,375,000 in October 2021. Indexed forward to today's value, that sale is roughly £1,305k. Recent local prices imply a broad valuation context of £1,163k to £1,648k based on its internal area. The Land Registry and EPC data was last updated 4 August 2026.

Property data
Sale history
Date Paid price Annual growth After inflation
Oct 2021 £1,375,000 6.1% 3.8%
Aug 2005 £525,000 -0.5% -2.1%
Aug 2002 £532,500 15.5% 13.7%
Jun 1996 £220,000 na na
Floor plan

Archived estate agent floor plan for 12, Observatory Road.

Floorplan 12
View floorplan
Internal area
160 square metres (1,722 square feet) according to latest EPC inspection
Price per internal area

This property sold for £8,593 per square metre (£798 per square foot) in Oct 2021. Indexed forward to today's value, this is roughly £8,159 per square metre (£758 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Oct 2021 £1,375,000 £8,594 £1,305,488 £8,159
Aug 2005 £525,000 £3,281 £1,283,306 £8,021
Aug 2002 £532,500 £3,328 £1,399,321 £8,746
Jun 1996 £220,000 £1,375 £1,248,426 £7,803

Calculated using the latest EPC internal area of 160 m². Earlier sale dates may not have had the same measured area available.

Valuation
The most recent sale price indexed forward to today's value is £1,305,488. This is one data point to inform the valuation. Another method is the valuation implied by what comparable homes are selling for. Homes in Mortlake are now selling for between £7,270 and £10,300 per square metre (£675 and £956 per square foot). Based on an internal area of 160 m², this implies a valuation between £1,163,000 and £1,648,000. Treat this as context only. For a valuation using hand-picked comparable sales, use the Advanced search tool — create a shortlist of similar condition homes, then export a valuation report.
Bedrooms
4
Type
Terrace
Council tax band
G
Plot size
172 square metres (1,851 square feet) - map showing freehold boundary lines
Archived listings
History:
Archived sales listing for 12 Observatory Road. Advertised on multiple portals. It was added on 17/08/2021. It last appeared Apr 2022.
Photos:

There are 15 archived estate agent listing photos for 12 Observatory Road.

Photos for 12 Observatory Road
View photos
Advertiser remarks:
  • 4 bedrooms
Planning applications
Planning ref:
March 2024 24/0448/PS192
Type:
Outline application - proposal prior to a full application, including assessments and scoping opinions.
Status:
Application approved
Address:
12 Observatory Road East Sheen London
Description:
Demolition of existing rear dormer and erection of new rear and side wrap-around dormer extension. Removal of 1No. chimney stack to party wall. 1No. chimney stack to be raised to allow construction of new dormer. Velux rooflights to front main roof.
Planning ref:
December 2022 22/3406/PS192
Type:
Outline application - proposal prior to a full application, including assessments and scoping opinions.
Status:
Application approved
Address:
12 Observatory Road East Sheen London
Description:
Construction of proposed garden room
Planning ref:
November 2022 22/3099/PS192
Type:
Outline application - proposal prior to a full application, including assessments and scoping opinions.
Status:
Application refused
Address:
12 Observatory Road East Sheen London
Description:
Construction of proposed garden room
EPC Inspections
Summary:
12 August 2021 - energy performance certificate grade E
Certificate:
View energy certificate on GOV.UK
Reason for EPC:
Marketed sale
Tenure:
Owner-occupied
Property type:
Semi-Detached House , has 7 habitable rooms. Estimated year built 1900 to 1929
Area:
160 sqm (1,722 square foot) total internal area
Comments:
Walls: Solid brick, as built, no insulation (assumed). Roof: Pitched, no insulation. Heating: Boiler and radiators, mains gas.
Frequently asked questions

12 Observatory Road is worth whatever price a willing buyer and seller agree upon. However, the following can provide useful context.

  • HouseMetric estimates the most recent sale price indexed forward to today's value is £1,305,488.
  • Based on an internal area of 160 m² and recent prices in Mortlake, this implies a lower and upper quartile range from £1,163,000 to £1,648,000, using HouseMetric's implied valuation methodology.

According to HM Land Registry price paid data, 12 Observatory Road last sold for £1,375,000 in October 2021.

HouseMetric shows 12 Observatory Road as 160 m² (1,722 sq ft), based on the latest internal area data available for this property. The bedroom count is shown as 4 bedrooms. Bedroom numbers can come from a previous estate agency listing, an EPC record, or an estimate based on the size of the property.

The latest EPC rating shown by HouseMetric is E, from an inspection dated 12 August 2021. EPC information comes from the public Energy Performance Certificate data for England and Wales.

When we last checked, 12 Observatory Road was in council tax band G. Council Tax bands can change, so check the latest Valuation Office Agency Council Tax list.

12 Observatory Road is in postcode SW14 7QD, in Mortlake. You can also view HouseMetric's sold-price page for Observatory Road, SW14 7QD or analysis of the Mortlake property market.

HouseMetric combines HM Land Registry price paid data, Energy Performance Certificate data and Ordnance Survey/open data. The data were last updated 4 August 2026. Figures such as indexed values and local valuation ranges are calculated estimates for context, while official records can change as public datasets are updated.

For more detail on HouseMetric data sources, update frequency and valuation methods, see the HouseMetric FAQs.