5 Mortimer Road, Cardiff, CF11 9JZ
About 5 Mortimer Road
5 Mortimer Road is a two-bedroom mid-terrace house in Cardiff (CF11 9JZ). It has a recorded floor area of 126 m² (around 1356 sq ft), construction records dating it to 1900-1929 and council tax band E. The latest certificate (December 2025) shows a C (score 71). When first surveyed in February 2011 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor; while roof efficiency dropped from Good to Average and window efficiency dropped from Good to Average. This certificate was lodged in the last six months, so the rating reflects current condition.
At 126 m² the property is well over the postcode median (79 m² across 30 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 70% of similar EPCs). On the market in November 2017 and unlisted since — roughly 9 years. Across the public record there are 6 sales, relatively high churn for a single property. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and a loft conversion, meaningful when judging how the property has evolved. Across 1997–2017, sale prices on this property compounded at 10.4% per year. Today's modelled estimate of £475,000 is 48.2% above the 2017 sale price. On a £-per-square-foot basis, the last sale (£236/sq ft) was about 19.9% above the typical sold price in the postcode.
What this property has
Inside
- Bedrooms2
- Bathrooms1
Building
- RefurbishedYes
Energy performance
The EPC has just been inspected, so the rating reflects current condition.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
Cavity wall insulation installed
Hot water efficiency decreased
Loft insulation upgraded to recommended levels
Get a survey for this property
Level 3 Building Survey
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 £1,020 · Includes VAT
Planning history
Planning history includes both a loft conversion and an extension — the classic family-home expansion.
2 applications on record at 5 Mortimer Road, Cardiff, CF11 9JZ
- May 2018Loft ConversionFullOutcome in report
Extension: Single storey
PROPOSED SINGLE STOREY EXTENSION AND PROPOSED DORMER LOFT CONVERSION WITH MAIN ROOF ALTERATIONS
Extension- Documents
- 6 docs on file
- Reference
- 18/00815/DCH
- More recent applications — locked
- ExtensionFeb 2020Decision
Unlock 5 Mortimer Road, Cardiff, CF11 9JZ's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (2 on record)
- All 2 applications on this property in full, plus 4 notable nearby
- The 12 documents, officer reports & conditions
- What the pattern means for extending or converting here
One time fee only - money back guarantee
Sales history & valuation
5 Mortimer Road has more than quadrupled in price since its earliest registered sale in 1997.
£475,000
Modelled from EPC, postcode comparables and a sale-price growth of 10.4% per year over 20 years.
£320,600
Growth on file: 10.4% per year over 20 years.
Sales timeline
17 November 2017Most recent
£320,600
+3.4%over 1 year29 September 2016
£310,000
+55.0%over 12 years9 August 2004
£199,950
+100.1%over 2 years14 December 2001
£99,950
+45.0%over 3 years9 July 1998
£68,950
+56.7%over 9 months7 October 1997
£44,000
Median price across the last 5 sales in CF11 9JZ: £265,000 (2025–2018).
Nearby sales in CF11 9JZ
Versus other Mortimer Road homes
On floor area, 5 Mortimer Road stands well clear of the street.
Price per m²
£2,544
Street avg £2,577
Floor Area
126 m²
Street avg 86 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
3.6 t/year
Street avg 3.8 t/year
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The neighbourhood at a glance
Crime
9/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Halfway Hotel — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







