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20a, Alder Copse, Horsham, RH12 1LD

4 sales on record1 planning record

Estimated value

£341,000

  • Since the 2005 sale (£79,000)+332%
  • Against RH12 1LD's recent median (£355,000)-4%

Newest record on this page: April 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Semi-detached
Habitable rooms
4
From EPC
Floor area
82 m²
883 sq ft
Energy rating
C
Score 76
Council tax
Band B
Tenure
Owner Occupied
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Valuation

About this valuation

How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.

Our estimate

£341,000

  • Against its 2005 sale (£79,000)+332%
  • Against RH12 1LD's recent median (£355,000)-4%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 20a is modelled from its 82 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in RH12 1LD. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.

What it's based on

  • Floor area

    82 m² from the EPC lodged in December 2025

  • Sales of this home

    4 sales recorded, the latest in 2005

  • Recent sales in RH12 1LD

    5 sales, median £355,000 (2026–2021)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: April 2026Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
Planning1 applicationFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

20a's modelled value sits at over four times its earliest registered sale price (1997).

Sales timeline

  1. 3 March 2005Most recent

    £79,000

    +83.7%over 4 years

  2. 27 July 2000

    £43,000

    -30.9%over 2 years

  3. 25 September 1997

    £62,200

  4. 25 September 1997

    £62,000

Median price across the last 5 sales in RH12 1LD: £355,000 (2026–2021).

Risks

What this page doesn't show

1 potential issue has already been flagged for 20a, Alder Copse, Horsham, RH12 1LD. The detail, evidence and what to ask about it are in the Risks Report.
  • Larger development activity nearbyIn report
  • Flood risk from rivers, sea and surface waterIn report
  • Subsidence and ground-stability signalsIn report
  • Refusals, enforcement and big schemes nearbyIn report

One time fee only - money back guarantee

Overview

About 20a

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

20a is a semi-detached house in Horsham (RH12 1LD). It has a recorded floor area of 82 m² (around 883 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (December 2025) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since July 2013. Between certificates, roof efficiency went from Good to Very Good and lighting went from Poor to Good; while window efficiency dropped from Average to Poor.

Held since March 2005 — that's 21 years off the open market, well above the local norm. Across the public record there are 4 sales, relatively high churn for a single property. Across 1997–2005, sale prices on this property compounded at 3.3% per year. Today's modelled estimate of £341,000 sits 331.6% above the 2005 sale of £79,000. On a £-per-square-foot basis, the last sale (£90/sq ft) was about 65.2% below the postcode norm. One planning record on file: an extension approved in 2004. Past consents include an extension, meaningful when judging how the property has evolved.

Before you decide

Everything you need to know about 20a

The true value, the hidden risks and the full sale history, in one report.

Larger development activity nearby

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Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Current Certificate(1 of 2)
Dec 2025

EPC Rating

A
B
C
C76
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Poor
CO2 Emissions
2.2 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 12 December 2035

9 years remaining

Property Improvements

Changes detected from historical EPC data

Dec 2025from Jul 2013
Roof
GoodVery Good

Roof insulation improved

Low Energy Lighting
18%100%

More low energy lighting installed

Planning

Planning history

Applications and permits filed against 20a, Alder Copse, Horsham, RH12 1LD, sourced from the PlanIt planning register.

Council records include a two-storey side extension at 20a.

1 application on record at 20a, Alder Copse, Horsham, RH12 1LD

1decisions1extensions1nearby
  1. Nov 2004
    ExtensionFull
    Outcome in report

    Extension: Two storey · Side of property

    2-Storey side extension

    Reference
    DC/04/2153
    Full record in report

Unlock 20a, Alder Copse, Horsham, RH12 1LD's full planning history

You're seeing the shape of it. The report has the substance.

  • Every decision — granted, refused or withdrawn (1 on record)
  • All 1 application on this property in full, plus 1 notable nearby
  • What the pattern means for extending or converting here
£14.99one-off · instant

One time fee only - money back guarantee

On the street

Versus other Alder Copse homes

Four headline reads against 21 similar houses on this street, drawn from the latest EPC and Land Registry data.

On price per m², 20a runs well behind the street norm.

Price per m²

£963

Street avg £3,953

Strongly below

Floor Area

82 m²

Street avg 77 m²

Above

Habitable Rooms

4 rooms

Street avg 4 rooms

On par

CO₂ Emissions

2.2 t/year

Street avg 3.5 t/year

Strongly above
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Horsham district page.
Full Horsham report

Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.

Crime

276/mo

Steady year-on-year across the wider district.

Nearest stop

0.3 km

Tower Close — bus stop.

Closest school

0.7 km

Arunside School, Horsham. 11 schools nearby.

Nearest schools

  • Arunside School, HorshamPrimary654m
  • St John's Catholic Primary SchoolPrimary654m
  • Tanbridge House SchoolSecondary881m
  • St Mary's CofE (Aided) Primary SchoolPrimary1.2km

Nearest stops

  • Tower CloseBus stop312m
  • Fellcott WayBus stop345m
  • Shandys CloseBus stop348m
  • Blackbridge Lane ShopsBus stop432m

Most reported crime locally

  • Violence & Sexual Offences1,282 reports31%
  • Anti-social Behaviour902 reports22%
  • Shoplifting681 reports16%
  • Criminal Damage & Arson315 reports8%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around RH12 1LD from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for RH12 1LD

Daytime· 07:00 – 23:00

49.0dB

Low
Night-time road noise heatmap for RH12 1LD

Night-time· 23:00 – 07:00

39.0dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

Mid 20th centurySemi-Detached HouseEPC C

We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.

From £595 · Includes VAT

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£337k

1 Anchor Court, Talbot Lane

RH12 1ET

2 bed1 bath
£368k

1 Brookfield Close

RH12 1QQ

£392k

1 Arunside, Blackbridge Lane

RH12 1SJ

£397k

1 Brockhurst Close

RH12 1UY

3 bed
£289k

1 Brook Terrace, Talbot Lane

RH12 1ES

1 bed1 bath
£428k

1 Alder Copse

RH12 1LD

3 bed1 bath
£434k

1 Cleves Mews

RH12 1QP

£266k

1 Bridge House, East Street

RH12 1AA

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for 20a is modelled from its 82 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in RH12 1LD. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
Where sold prices come from
Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 4 sales are recorded for 20a. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
Reading the EPC
Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 20a was lodged in December 2025 at band C and is valid until December 2035. 2 certificates are on record, which shows how the home has changed.
Planning records
Planning applications are collected from local authority registers through PlanIt. 1 application is matched to 20a. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
Area figures
Crime is police-recorded street-level data over the last 15 months, which places each incident at an approximate point. The 11 schools and 30 stops listed are measured in a straight line from RH12 1LD, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
Council tax band
20a is in council tax band B. Bands are set by the Valuation Office Agency from historic values (1 April 1991 in England, 1 April 2003 in Wales), not today's price; the amount you pay depends on the council's rate for the band.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 20a, Alder Copse, Horsham, RH12 1LD. Each answer is also embedded as structured data for search engines.

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