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21, THE MALLARDS, HEMEL HEMPSTEAD, HP3 9DP - £450,000

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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 THE MALLARDS is a small extended semi-detached house of 101m², built sometime between 2007 and 2011, which could now be worth an estimated £555,352. It was last sold for £450,000 in November 2016, which was around 2% above the average November 2016 semi-detached price in the Dacorum local authority area. The most recent EPC inspection was September 2016, where the current energy rating was C, and the potential energy rating was B.

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21 THE MALLARDS Sold Prices

Land registry data shows two sales for 21 THE MALLARDS since 1st January 1995. The below table shows the price paid for the two sales, along with the average semi-detached price in the Dacorum local authority area for the corresponding sale date. Both of the two 21 THE MALLARDS sales were for above the average price. The average price is sourced from the Office for National Statistics' House Price Index (HPI).

DatePriceHPI PriceVariation from HPI
2016
2 NOV
£450,000£441,689
up arrow
2% above HPI
2007
7 NOV
£305,000£293,391
up arrow
4% above HPI

21 THE MALLARDS Price Paid vs. HPI Average

The below graph shows the average semi-detached house price in the Dacorum local authority area over time, sourced from the HPI. The two 21 THE MALLARDS sales from November 2007 and November 2016 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 November 2007 sale was for 4% above the HPI. So the extrapolation line tracks at 4% above the HPI over time, until the November 2016 sale, where it falls to 2% above the HPI. The line then continues to track at 2% above the HPI.

21, THE MALLARDS, HEMEL HEMPSTEAD, HP3 9DP: Price paid vs HM Land Registry's House Price Index

What might 21 THE MALLARDS be worth now?

21 THE MALLARDS might now be worth an estimated £555,352.

This is based on house price inflation of 23.4%, between November 2016 and April 2026, for semi-detached houses, in the Dacorum local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 23.4% inflationary increase is applied to the most recent sale price for 21 THE MALLARDS of £450,000 on 2nd November 2016. For the value to have increased from £450,000 to £555,352 over the ten years and seven months to April 2026, the following assumptions must hold true:

  • The value of 21 THE MALLARDS has moved in line with the HPI for semi-detached houses in the Dacorum local authority area.
  • The November 2016 sale price of £450,000 represented a fair market value for the property.
  • The size, condition, and specification of 21 THE MALLARDS has not materially changed since November 2016.
Disclaimer: Please note that this is a theoretical estimate based on assumptions which may or may not be correct. It should not be relied on for any purpose.

How Large is 21 THE MALLARDS?

21 THE MALLARDS is 101m², which includes one extension, according to the EPC inspection conducted in September 2016. This puts it in the smallest 30% of semi-detached houses houses in Hemel Hempstead, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in Hemel Hempstead, and where 21 THE MALLARDS lies on this distribution: 22% of semi-detached houses houses are smaller than 21 THE MALLARDS, and 77% of houses are larger. Note that EPC data is not available for all properties in Hemel Hempstead.

21, THE MALLARDS, HEMEL HEMPSTEAD, HP3 9DP: Size of property relative to semi-detached houses in Hemel Hempstead

21 THE MALLARDS: Plot and Title Map

21 THE MALLARDS sits on a plot of roughly 0.040 of an acre, or 162m². The below map shows the location of 21 THE MALLARDS, 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 THE MALLARDS). 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, THE MALLARDS, HEMEL HEMPSTEAD, HP3 9DP: Plot and title map

Where is 21 THE MALLARDS?

21 THE MALLARDS is located in HEMEL HEMPSTEAD, in the HP3 postcode district. The below map shows the position of No. 21 on THE MALLARDS.

21, THE MALLARDS, HEMEL HEMPSTEAD, HP3 9DP: Location map and indicative extent of plot

All property sales on THE MALLARDS

Most recent sales first:

Limited data available
2025
19 NOV
£268,000
Limited data available
2025
20 FEB
£305,000
Full data available
2024
20 AUG
£435,000
Full data available
2024
10 MAY
£685,000
Full data available
2024
27 MAR
£605,000
Limited data available
2023
22 NOV
£225,000
Full data available
2022
26 MAY
£655,000
Limited data available
2021
27 AUG
£295,000
Full data available
2020
17 DEC
£385,000
Full data available
2020
13 NOV
£365,000
Limited data available
2019
19 JUN
£235,000
Limited data available
2017
20 DEC
£295,000
Limited data available
2017
30 JUN
£228,000
Full data available
2016
2 NOV
£450,000
Full data available
2016
20 JUL
£332,000
Limited data available
2016
25 MAY
£230,000
Full data available
2016
12 FEB
£330,250
Full data available
2015
30 OCT
£415,000
Limited data available
2015
31 JUL
£175,000
Limited data available
2015
23 JAN
£199,950
Full data available
2014
17 DEC
£399,950
Limited data available
2014
15 AUG
£199,950
Limited data available
2014
22 APR
£183,000
Limited data available
2014
17 MAR
£235,000
Full data available
2013
30 MAY
£349,950
Limited data available
2013
3 MAY
£155,000
Full data available
2010
28 MAY
£372,000
Limited data available
2009
2 APR
£130,000
Limited data available
2008
14 NOV
£160,000
Limited data available
2008
9 SEP
£162,000
Limited data available
2008
20 JUN
£325,000
Full data available
2008
24 APR
£298,500
Limited data available
2008
11 APR
£165,000
Limited data available
2008
3 APR
£180,000
Limited data available
2008
28 MAR
£210,000
Limited data available
2008
11 JAN
£245,000
Full data available
2008
4 JAN
£240,000
Limited data available
2007
9 NOV
£245,000
Full data available
2007
7 NOV
£305,000
Full data available
2007
2 NOV
£245,000
Limited data available
2007
17 AUG
£377,500
Limited data available
2007
3 JUL
£335,000
Limited data available
2007
11 MAY
£235,000
Full data available
2007
27 MAR
£220,000
Full data available
2007
9 MAR
£225,000
Full data available
2007
8 MAR
£315,000
Full data available
2007
21 FEB
£370,000
Limited data available
2007
13 FEB
£215,000
Full data available
2006
13 DEC
£310,000
Full data available
2004
2 JUN
£290,000
Limited data available
2004
21 JAN
£285,000
Full data available
2003
23 MAY
£282,000
Limited data available
2002
18 NOV
£290,000
Limited data available
2002
31 MAY
£249,000
Full data available
2000
4 DEC
£240,000
Full data available
1999
25 MAR
£172,000
Full data available
1997
19 DEC
£154,950
Limited data available
1997
19 DEC
£154,950
Limited data available
1997
19 DEC
£150,000
Limited data available
1997
17 DEC
£147,000
Limited data available
1997
15 DEC
£154,000
Limited data available
1997
12 DEC
£154,950
Full data available
1997
5 DEC
£156,950
Full data available
1997
28 NOV
£151,950
Full data available
1997
21 NOV
£159,950
Source: HM Land Registry Price Paid Data
Licence: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Source: HM Land Registry UK House Price Index
Licence: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Copyright statement: This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use.