Property/Postcode Data Search:

20, SEAMILL PARK AVENUE, WORTHING, BN11 2PU - £418,000

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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.

20 SEAMILL PARK AVENUE is a large terraced house of 129m², built sometime between 1930 and 1949, which could now be worth an estimated £501,342. It was last sold for £418,000 in November 2019, which was around 49% above the average November 2019 terraced price in the Worthing local authority area. The most recent EPC inspection was January 2022, where the current energy rating was D, and the potential energy rating was C.

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20 SEAMILL PARK AVENUE Sold Prices

Land registry data shows two sales for 20 SEAMILL PARK AVENUE since 1st January 1995. The below table shows the price paid for the two sales, along with the average terraced price in the Worthing local authority area for the corresponding sale date. Both of the two 20 SEAMILL PARK AVENUE 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
2019
15 NOV
£418,000£280,108
up arrow
49% above HPI
2015
1 APR
£340,000£220,650
up arrow
54% above HPI

20 SEAMILL PARK AVENUE Price Paid vs. HPI Average

The below graph shows the average terraced house price in the Worthing local authority area over time, sourced from the HPI. The two 20 SEAMILL PARK AVENUE sales from April 2015 and November 2019 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 April 2015 sale was for 54% above the HPI. So the extrapolation line tracks at 54% above the HPI over time, until the November 2019 sale, where it falls to 49% above the HPI. The line then continues to track at 49% above the HPI.

20, SEAMILL PARK AVENUE, WORTHING, BN11 2PU: Price paid vs HM Land Registry's House Price Index

What might 20 SEAMILL PARK AVENUE be worth now?

20 SEAMILL PARK AVENUE might now be worth an estimated £501,342.

This is based on house price inflation of 19.9%, between November 2019 and August 2025, for terraced houses, in the Worthing local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 19.9% inflationary increase is applied to the most recent sale price for 20 SEAMILL PARK AVENUE of £418,000 on 15th November 2019. For the value to have increased from £418,000 to £501,342 over the six years and three months to August 2025, the following assumptions must hold true:

  • The value of 20 SEAMILL PARK AVENUE has moved in line with the HPI for terraced houses in the Worthing local authority area.
  • The November 2019 sale price of £418,000 represented a fair market value for the property.
  • The size, condition, and specification of 20 SEAMILL PARK AVENUE has not materially changed since November 2019.
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 20 SEAMILL PARK AVENUE?

20 SEAMILL PARK AVENUE is 129m² according to the EPC inspection conducted in January 2022. This puts it in the largest 40% of terraced houses houses in Worthing, based on EPC data. The below chart shows the distribution of terraced houses houses by size in Worthing, and where 20 SEAMILL PARK AVENUE lies on this distribution: 61% of terraced houses houses are smaller than 20 SEAMILL PARK AVENUE, and 38% of houses are larger. Note that EPC data is not available for all properties in Worthing.

20, SEAMILL PARK AVENUE, WORTHING, BN11 2PU: Size of property relative to terraced houses houses in Worthing

20 SEAMILL PARK AVENUE: Plot and Title Map

20 SEAMILL PARK AVENUE sits on a plot of roughly 0.094 of an acre, or 382m². The below map shows the location of 20 SEAMILL PARK AVENUE, 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 20 SEAMILL PARK AVENUE). 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.

20, SEAMILL PARK AVENUE, WORTHING, BN11 2PU: Plot and title map

Where is 20 SEAMILL PARK AVENUE?

20 SEAMILL PARK AVENUE is located in WORTHING, in the BN11 postcode district. The below map shows the position of No. 20 on SEAMILL PARK AVENUE.

20, SEAMILL PARK AVENUE, WORTHING, BN11 2PU: Location map and indicative extent of plot

All property sales on SEAMILL PARK AVENUE

Most recent sales first:

Limited data available
2025
6 MAR
£360,000
Limited data available
2021
18 JUN
£366,000
Full data available
2020
18 DEC
£590,000
Full data available
2019
15 NOV
£418,000
Full data available
2016
15 NOV
£388,968
Full data available
2015
1 APR
£340,000
Limited data available
2014
11 APR
£312,500
Limited data available
2006
22 AUG
£286,950
Limited data available
2006
7 APR
£180,000
Full data available
2006
31 MAR
£250,000
Limited data available
2004
26 OCT
£380,000
Limited data available
2003
8 SEP
£285,000
Limited data available
2003
4 AUG
£224,000
Limited data available
2003
23 JUL
£335,000
Limited data available
2001
30 AUG
£235,000
Full data available
1998
6 NOV
£92,000
Full data available
1998
4 SEP
£125,000
Limited data available
1997
27 MAY
£137,000
Source: HM Land Registry Price Paid Data
Licence: Contains HM Land Registry data © Crown copyright and database right 2025. 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 2025. This data is licensed under the Open Government Licence v3.0.
Copyright statement: This information is subject to Crown copyright and database rights 2025 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 2025 Ordnance Survey 100026316. Conditions of use.