The information on this page is based on a number of underlying datasets, most of which are updated monthly. We maintain an update schedule which explains which version of each dataset we are currently relying on.
21 PLYMOUTH ROAD is a small extended semi-detached house of 102m², built sometime between 1950 and 1966, which could now be worth an estimated £421,357. It was last sold for £219,500 in June 2010, which was around 2% below the average June 2010 semi-detached price in the Chelmsford local authority area. The most recent EPC inspection was November 2024, where the current energy rating was D, and the potential energy rating was B.
Land registry data shows three sales for 21 PLYMOUTH ROAD since 1st January 1995. The below table shows the price paid for the three sales, along with the average semi-detached price in the Chelmsford local authority area for the corresponding sale date. One of the three 21 PLYMOUTH ROAD sales was for below the average price, whilst two were for above the average price. The average price is sourced from the Office for National Statistics' House Price Index (HPI).
| Date | Price | HPI Price | Variation from HPI |
|---|---|---|---|
2010 18 JUN | £219,500 | £224,602 | 2% below HPI |
2002 2 SEP | £158,000 | £149,891 | 5% above HPI |
1997 26 AUG | £92,500 | £73,202 | 26% above HPI |
The below graph shows the average semi-detached house price in the Chelmsford local authority area over time, sourced from the HPI. The three 21 PLYMOUTH ROAD sales between August 1997 and June 2010 have been plotted on the graph. A line has been extrapolated to show what the value of the property might have been over time, following each sale, had it maintained the same margin above or below the HPI (as a percentage). For example, the September 2002 sale was for 5% above the HPI. So the extrapolation line tracks at 5% above the HPI over time, until the June 2010 sale, where it falls to 2% below the HPI. The line then continues to track at 2% below the HPI.

21 PLYMOUTH ROAD might now be worth an estimated £421,357.
This is based on house price inflation of 92%, between June 2010 and August 2025, for semi-detached houses, in the Chelmsford local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 92% inflationary increase is applied to the most recent sale price for 21 PLYMOUTH ROAD of £219,500 on 18th June 2010. For the value to have increased from £219,500 to £421,357 over the fourteen years and ten months to August 2025, the following assumptions must hold true:
21 PLYMOUTH ROAD is 102m², which includes one extension, according to the EPC inspection conducted in November 2024. This puts it in the smallest 40% of semi-detached houses houses in Chelmsford, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in Chelmsford, and where 21 PLYMOUTH ROAD lies on this distribution: 31% of semi-detached houses houses are smaller than 21 PLYMOUTH ROAD, and 68% of houses are larger. Note that EPC data is not available for all properties in Chelmsford.

21 PLYMOUTH ROAD sits on a plot of roughly 0.068 of an acre, or 274m². The below map shows the location of 21 PLYMOUTH ROAD, an approximate outline of the building(s), and the indicative extent of the property. The plot extent is a Land Registry INSPIRE Index Polygon, and it is important to note that a title may include more than one polygon, whereas only one polygon is shown on the map (the polygon which intersects with the position of 21 PLYMOUTH ROAD). The full extent of the land contained in any registered title can only be identified from the individual title plan. The maps on this page should not be relied upon to establish the extent of a title.

21 PLYMOUTH ROAD is located in CHELMSFORD, in the CM1 postcode district. The below map shows the position of No. 21 on PLYMOUTH ROAD.

Most recent sales first: