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.
321 MCMULLEN ROAD is a very large extended detached house of 155m², built sometime between 1983 and 1990, which could now be worth an estimated £361,152. It was last sold for £195,000 in September 2003, which was around 25% above the average September 2003 detached price in the Darlington local authority area. The most recent EPC inspection was April 2014, where the current energy rating was D, and the potential energy rating was C.
Land registry data shows two sales for 321 MCMULLEN ROAD since 1st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Darlington local authority area for the corresponding sale date. Both of the two 321 MCMULLEN ROAD sales 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 |
|---|---|---|---|
2003 16 SEP | £195,000 | £156,468 | 25% above HPI |
2002 7 JUN | £131,000 | £113,028 | 16% above HPI |
The below graph shows the average detached house price in the Darlington local authority area over time, sourced from the HPI. The two 321 MCMULLEN ROAD sales from June 2002 and September 2003 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 June 2002 sale was for 16% above the HPI. So the extrapolation line tracks at 16% above the HPI over time, until the September 2003 sale, where it rises to 25% above the HPI. The line then continues to track at 25% above the HPI.

321 MCMULLEN ROAD might now be worth an estimated £361,152.
This is based on house price inflation of 85.2%, between September 2003 and August 2025, for detached houses, in the Darlington local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 85.2% inflationary increase is applied to the most recent sale price for 321 MCMULLEN ROAD of £195,000 on 16th September 2003. For the value to have increased from £195,000 to £361,152 over the 22 years and one month to August 2025, the following assumptions must hold true:
321 MCMULLEN ROAD is 155m², which includes one extension, according to the EPC inspection conducted in April 2014. This puts it in the largest 20% of detached houses houses in Darlington, based on EPC data. The below chart shows the distribution of detached houses houses by size in Darlington, and where 321 MCMULLEN ROAD lies on this distribution: 83% of detached houses houses are smaller than 321 MCMULLEN ROAD, and 16% of houses are larger. Note that EPC data is not available for all properties in Darlington.

321 MCMULLEN ROAD sits on a plot of roughly 0.158 of an acre, or 638m². The below map shows the location of 321 MCMULLEN 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 321 MCMULLEN 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.

321 MCMULLEN ROAD is located in DARLINGTON, in the DL1 postcode district. The below map shows the position of No. 321 on MCMULLEN ROAD.

Most recent sales first: