12 Mortimer Road, Cardiff, CF11 9JZ
About 12 Mortimer Road
12 Mortimer Road is a two-bedroom mid-terrace house in Cardiff (CF11 9JZ). It has a recorded floor area of 144 m² (around 1550 sq ft), construction records dating it to before 1900 and council tax band F. The latest certificate (November 2025) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since November 2025. Between certificates, window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 81). This certificate was lodged in the last six months, so the rating reflects current condition.
At 144 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). Across 2000–2024, sale prices on this property compounded at 2.7% per year. Today's modelled estimate of £462,000 sits 114.9% above the 2024 sale of £215,000. On a £-per-square-foot basis, the last sale (£139/sq ft) was about 32.2% below the postcode norm. Sold October 2024 for £215,000. Across the public record there are 4 sales, relatively high churn for a single property. 2 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension, meaningful when judging how the property has evolved.
What this property has
Inside
- Bedrooms2
- Dining roomYes
Outside
- Private gardenRear
Energy performance
The EPC has just been inspected, so the rating reflects current condition.
EPC Rating
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has been extended more than once, we believe a Level 3 building survey should be considered.
From £1,020 · Includes VAT
Planning history
A a loft conversion application was refused at 12 Mortimer Road in 2024.
2 applications on record at 12 Mortimer Road, Cardiff, CF11 9JZ
- Nov 2024Loft ConversionOutlineOutcome in report
Extension: Single storey · Rear of property
Single storey rear extension and rear dormer loft conversion
Extension- Documents
- 10 docs on file
- Reference
- 24/02558/CLPUD
- More recent applications — locked
- ExtensionJan 2025Decision
Unlock 12 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- Every decision — granted, refused or withdrawn (2 on record)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 20 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
12 Mortimer Road's modelled value sits at over four times its earliest registered sale price (2000).
£462,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.7% per year over 24 years.
£215,000
Growth on file: 2.7% per year over 24 years.
Sales timeline
9 October 2024Most recent
£215,000
+2.4%over 16 years12 June 2008
£210,000
+13.5%over 2 years17 July 2005
£185,000
+63.8%over 4 years10 August 2000
£112,950
Median price across the last 5 sales in CF11 9JZ: £319,000 (2025–2018).
Nearby sales in CF11 9JZ
Versus other Mortimer Road homes
12 Mortimer Road outperforms the street on floor area by a wide margin.
Price per m²
£1,493
Street avg £2,630
Floor Area
144 m²
Street avg 85 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
3.2 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.







