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18 St Nicholas Square, Maritime Quarter, Swansea, SA1 1UG

Estimated value

£113,000

  • Since the 2000 sale (£40,000)+183%
  • Against SA1 1UG's recent median (£90,000)+26%

Newest record on this page: February 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
Floor 00
Bedroom
1
Bathroom
1
Floor area
39 m²
420 sq ft
Energy rating
D
Score 63
Council tax
Band C
Tenure
Private Rental
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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

£113,000

  • Against its 2000 sale (£40,000)+183%
  • Against SA1 1UG's recent median (£90,000)+26%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 18 St Nicholas Square is modelled from its 39 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in SA1 1UG. 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

    39 m² from the EPC lodged in May 2019

  • Sales of this home

    1 sale recorded, the latest in 2000

  • Recent sales in SA1 1UG

    5 sales, median £90,000 (2026–2018)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: February 2026Latest 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.

18 St Nicholas Square valuation sits well clear of the typical sold price in this postcode.

Sales timeline

  1. 11 February 2000Most recent

    £40,000

Median price across the last 5 sales in SA1 1UG: £90,000 (2026–2018).

Risks

What this page doesn't show

2 potential issues have already been flagged for 18 St Nicholas Square, Maritime Quarter, Swansea, SA1 1UG. The detail, evidence and what to ask about it are in the Risks Report.
  • Signs of HMO activity in the areaIn 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

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Overview

About 18 St Nicholas Square

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

18 St Nicholas Square is a one-bedroom semi-detached house in Maritime Quarter, Swansea, Swansea (SA1 1UG). It has a recorded floor area of 39 m² (around 420 sq ft), construction records dating it to 1983-1990 and council tax band C. At 39 m² this is the smallest unit on EPC record across the building (39–53 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (63 versus a best of 79). The latest certificate (May 2019) shows a D (score 63), on the cusp of jumping into the C band. Earlier certificates rated it C (September 2008); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Average; while hot-water efficiency dropped from Good to Average. The recommended improvements would push it to C (score 74).

Untraded for 27 years, with the last transfer in February 2000. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £113,000 sits 182.5% above the 2000 sale of £40,000. On a £-per-square-foot basis, the last sale (£95/sq ft) was about 46.8% below the postcode norm.

Specifications

What this property has

Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.

Inside

  • Bedrooms1
  • Bathrooms1

Outside

  • Communal gardenYes
Before you decide

Everything you need to know about 18 St Nicholas Square

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

Signs of HMO activity in the areaLarger 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.

18 St Nicholas Square sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.

Current Certificate(1 of 2)
May 2019

EPC Rating

A
B
C
D
D63
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Average
Windows
Average
CO2 Emissions
2.2 t/year
Occupancy
Rented

Certificate validity

Valid until 8 May 2029

2 years remaining

Property Improvements

Changes detected from historical EPC data

May 2019from Sept 2008
EPC improved fromC72toD63
Hot Water
Main SystemMain (No Stat)

Hot water system changed

Low Energy Lighting
0%33%

More low energy lighting installed

Planning

Planning history

Applications and permits filed against 18 St Nicholas Square, Maritime Quarter, Swansea, SA1 1UG, sourced from the PlanIt planning register.

18 St Nicholas Square has no planning applications on record.

7

But the area is active

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

On the street

Versus other St Nicholas Square homes

Four headline reads against 22 similar flats on this street, drawn from the latest EPC and Land Registry data.

EPC Rating for 18 St Nicholas Square lags the street by a wide margin.

Price per m²

£1,026

Street avg £1,986

Strongly below

Floor Area

39 m²

Street avg 43 m²

Strongly below

Habitable Rooms

2 rooms

Street avg 2 rooms

On par

CO₂ Emissions

2.2 t/year

Street avg 1.4 t/year

Strongly below
Area

The neighbourhood at a glance

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

Crime

580/mo

Steady year-on-year across the wider district.

Nearest stop

0.1 km

Ferrara Square — bus stop.

Nearest stops

  • Ferrara SquareBus stop134m
  • Swansea MarinaBus stop248m
  • Swansea MuseumBus stop248m
  • HighmoorBus stop304m

Most reported crime locally

  • Violence & Sexual Offences3,276 reports35%
  • Anti-social Behaviour1,210 reports13%
  • Shoplifting1,135 reports12%
  • Public Order981 reports11%

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 2 HomeBuyer Report

Late 20th centuryGround Floor FlatEPC D

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 £495 · 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.
£119k

1 St Nicholas Square, Maritime Quarter

SA1 1UG

1 bed1 bath
£121k

1 Abernethy Quay, Maritime Quarter

SA1 1UF

1 bed1 bath
£300k

1 Fishermans Way, Maritime Quarter

SA1 1SU

1 bed
£162k

1 Cork House, Mannheim Quay, Maritime Quarter

SA1 1RT

2 bed
£164k

1 Weavers House, Mannheim Quay, Maritime Quarter

SA1 1RU

2 bed1 bath
£169k

10 Abernethy Quay, Maritime Quarter

SA1 1UF

2 bed
£241k

1 Camona Drive, Maritime Quarter

SA1 1YJ

2 bed
£274k

1 St Vincent Crescent, Maritime Quarter

SA1 1YW

2 bed1 bath

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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 18 St Nicholas Square is modelled from its 39 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in SA1 1UG. 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. 1 sale is recorded for 18 St Nicholas Square. 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 18 St Nicholas Square was lodged in May 2019 at band D and is valid until May 2029. 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 18 St Nicholas Square. 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 16 months, which places each incident at an approximate point. Schools and stops are measured in a straight line from SA1 1UG.
Council tax band
18 St Nicholas Square is in council tax band C. 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 18 St Nicholas Square, Maritime Quarter, Swansea, SA1 1UG. Each answer is also embedded as structured data for search engines.

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