18a, Crymlyn Street, Port Tennant, Swansea, SA1 8NX
About 18a
18a is a two-bedroom semi-detached house in Port Tennant, Swansea, Swansea (SA1 8NX). It has a recorded floor area of 134 m² (around 1442 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (July 2015) shows a C (score 73). The recommended improvements would push it to B (score 84). The latest certificate is from July 2015, so improvements made since then won't be reflected.
Held since January 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 134 m² the property is well over the postcode median (77 m² across 28 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 71% of similar EPCs). Today's modelled estimate of £132,000 sits 200% above the 2007 sale of £44,000. On a £-per-square-foot basis, the last sale (£31/sq ft) was about 63.4% below the postcode norm. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved.
What this property has
Inside
- Bedrooms2
Outside
- Private gardenYes
Building
- Central heatingYes
- RefurbishedYes
Everything you need to know about 18a
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 01 Jul 2025
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 £820 · Includes VAT
Planning history
18a has been extended on multiple sides of the property across separate planning applications.
2 applications on record at 18a, Crymlyn Street, Port Tennant, Swansea, SA1 8NX
- Apr 2010ExtensionFullOutcome in report
Extension: Two storey · Front of property
Two storey front extension
- Documents
- 6 docs on file
- Reference
- 2010/0497
- More recent applications — locked
- ExtensionApr 2025Decision
Unlock 18a, Crymlyn Street, Port Tennant, Swansea, SA1 8NX'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- Every decision — granted, refused or withdrawn (2 on record)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 53 notable nearby
- The 15 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
18a's estimated value is more than triple its earliest registered sale price (2007).
£132,000
Modelled from EPC, postcode comparables.
£44,000
Recorded with HM Land Registry.
Sales timeline
29 January 2007Most recent
£44,000
Median price across the last 5 sales in SA1 8NX: £110,000 (2025–2021).
Nearby sales in SA1 8NX
23 Crymlyn Street, Port Tennant, Swansea, SA1 8NX
Sold Apr 2025
£118,00020 Crymlyn Street, Port Tennant, Swansea, SA1 8NX
Sold Nov 2023
£118,00025 Crymlyn Street, Port Tennant, Swansea, SA1 8NX
Sold Apr 2022
£100,00032 Crymlyn Street, Port Tennant, Swansea, SA1 8NX
Sold Nov 2021
£110,00036 Crymlyn Street, Port Tennant, Swansea, SA1 8NX
Sold Sept 2021
£110,000
Versus other Crymlyn Street homes
Floor Area for 18a runs comfortably ahead of the street norm.
Price per m²
£328
Street avg £942
Floor Area
134 m²
Street avg 80 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
3.5 t/year
Street avg 3.9 t/year
Everything you need to know about 18a
The true value, the hidden risks and the full sale history, in one report.
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The neighbourhood at a glance
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Hoo Street — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.






