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17 Heol Isaf, Radyr, Cardiff, CF15 8AG

4 sales on record

Estimated value

£1,163,000

  • Since the 2025 sale (£6,000)+19283%
  • Against CF15 8AG's recent median (£249,950)+365%

Newest record on this page: March 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Detached
Habitable rooms
11
From EPC
Floor area
251 m²
2702 sq ft
Energy rating
E
Score 49
Council tax
Band H
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

£1,163,000

  • Against its 2025 sale (£6,000)+19283%
  • Against CF15 8AG's recent median (£249,950)+365%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 17 Heol Isaf is modelled from its 251 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in CF15 8AG. 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

    251 m² from the EPC lodged in June 2022

  • Sales of this home

    4 sales recorded, the latest in 2025

  • Recent sales in CF15 8AG

    5 sales, median £249,950 (2023–2002)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: March 2025Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
PlanningNone on this homeFull 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.

Latest sale on 17 Heol Isaf was the lowest on Land Registry record across the postcode.

Sales timeline

  1. 24 March 2025Most recent

    £6,000

    -99.5%over 2 years

  2. 13 January 2023

    £1,125,000

    +382.8%over 23 years

  3. 24 May 1999

    £233,000

    -11.7%over 2 years

  4. 26 August 1996

    £264,000

Median price across the last 5 sales in CF15 8AG: £249,950 (2023–2002).

Risks

What this page doesn't show

1 potential issue has already been flagged for 17 Heol Isaf, Radyr, Cardiff, CF15 8AG. 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 17 Heol Isaf

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

17 Heol Isaf is a detached house in Radyr, Cardiff, Cardiff (CF15 8AG). It has a recorded floor area of 251 m² (around 2702 sq ft), construction records dating it to 1900-1929 and council tax band H. The latest certificate (June 2022) shows an E (score 49), well below the UK norm with real room to improve. When first surveyed in August 2012 the rating was F, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Poor. The recommended improvements would lift it to C (score 76), a 2-band jump.

At 251 m² the property is well over the postcode median (159 m² across 4 EPCs), placing it in the larger end of the local stock. Across 1996–2025, sale prices on this property compounded at -12.4% per year. Today's modelled estimate of £1,163,000 sits 19283.3% above the 2025 sale of £6,000. On a £-per-square-foot basis, the last sale (£2/sq ft) was about 98.3% below the postcode norm. Most recent transfer was March 2025 at £6,000 — fresh data.

Before you decide

Everything you need to know about 17 Heol Isaf

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

Larger development activity nearby

Pick your report · from £14.99

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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.

17 Heol Isaf's carbon output runs well above what efficient homes in the postcode produce.

Current Certificate(1 of 2)
Jun 2022

EPC Rating

A
B
C
D
E
E49
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
12.0 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 5 June 2032

5 years remaining

Property Improvements

Changes detected from historical EPC data

Jun 2022from Aug 2012
EPC improved fromF31toE49
Windows
Mostly DoubleFull Double

Windows upgraded, improving insulation

Planning

Planning history

Applications and permits filed against 17 Heol Isaf, Radyr, Cardiff, CF15 8AG, sourced from the PlanIt planning register.

17 Heol Isaf has no planning applications on record.

1

But the area is active

1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.

Area

The neighbourhood at a glance

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

Rail-style transport is unusually close for this postcode.

Crime

85/mo

Steady year-on-year across the wider district.

Nearest stop

0.1 km

Danybryn — bus stop.

Nearest stops

  • DanybrynBus stop114m
  • Station RoadBus stop114m
  • DanybrynBus stop158m
  • Radur Rail StationRailway station246m

Most reported crime locally

  • Violence & Sexual Offences366 reports33%
  • Anti-social Behaviour150 reports14%
  • Public Order141 reports13%
  • Shoplifting104 reports9%

Go deeper on the local area

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

SDL Surveying

Get a survey for this property

Level 3 Building Survey

Victorian-eraDetached HouseEPC EPre-1919 buildExtended multiple times (2+ extensions)Solid (non-cavity) walls

Because the property was built before 1919, has been extended more than once, and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.

From £1,645 · 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.
£743k

1 Caer Idwen, Morganstown

CF15 8FZ

4 bed3 bath
£661k

1 Clos Harry Corner, Radyr

CF15 8GR

£630k

1 Clos Tylaway, Radyr

CF15 8DU

4 bed3 bath
£601k

1 Bates Court, Radyr

CF15 8EJ

5 bed3 bath
£583k

1 Clos Y Mynydd, Morganstown

CF15 8FH

4 bed2 bath
£553k

1 Cilfedw, Radyr

CF15 8AR

£544k

1 Caer Graig, Radyr

CF15 8RD

2 bed
£513k

1 Bryncoed, Radyr

CF15 8RH

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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 17 Heol Isaf is modelled from its 251 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in CF15 8AG. 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 17 Heol Isaf. 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 17 Heol Isaf was lodged in June 2022 at band E and is valid until June 2032. 2 certificates are on record, which shows how the home has changed.
Planning records
Planning applications are collected from local authority registers through PlanIt. None is matched to 17 Heol Isaf. 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 13 months, which places each incident at an approximate point. Schools and stops are measured in a straight line from CF15 8AG.
Council tax band
17 Heol Isaf is in council tax band H. 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 17 Heol Isaf, Radyr, Cardiff, CF15 8AG. Each answer is also embedded as structured data for search engines.

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