Castle View, Parliament Square, Castletown
Description
DESCRIPTION A beautifully refurbished office building providing just short of 2,000 sq ft of office and ancillary space. This restored property is located on Parliament Square in historic Castletown, with views of Castle Rushen and the Old House of Keys. LOCATION Heading from Douglas and through Ballasalla, take the A5 past the airport, take a right at the roundabout onto Victoria Road past the Station Garage. At the next roundabout take the left turn to run alongside the river onto Bridge Street. Cross the Bridge over the harbour and you will see Castle Rushen on your right-hand side. Castle View is on your left next to the Old House of Keys. ACCOMMODATION Ground Floor: (approx. 722 sq ft) Vestibule/Hall Under…
‹ Back to searchNot marked as sole agency on the original listing, so this property may also be marketed by other agents not captured in this data.
Explore solar potential on the Isle of Man
Understand the seasonal solar resource and what to check about a roof. No individual property has been assessed.
What would improving it be worth?
Value added is the extra floor area priced at £2,724/m² — the midpoint asking price per m² among 34 Isle of Man properties currently for sale that publish a floor area. Cost uses real Isle of Man build rates: £4,000–£6,000/m² new build and £2,000–£4,000/m² refurbishment, depending on quality. Net is against the mid rate. The last column is how often Isle of Man actually grants that kind of application.
| Improvement | Value it might add | Likely cost | Net | Granted |
|---|---|---|---|---|
| Add a bedroom (single-storey extension) A modest double plus circulation, built new. ~14 m² |
£38,142 | £52,500 14 m² · mid spec new build range £42,000–£63,000 |
−£14,358 | 0% (305) |
| Loft conversion with a bedroom Works inside an existing roof, so it prices as refurbishment rather than new build — which is why it usually wins. ~20 m² |
£54,489 | £41,000 20 m² · mid spec refurb range £33,000–£50,000 |
+£13,489 | 0% (46) |
| Two-storey extension Roughly 14 m² on each of two floors. ~28 m² |
£76,285 | £105,000 28 m² · mid spec new build range £84,000–£126,000 |
−£28,715 | 0% (66) |
| Garage, annexe or outbuilding Detached space is worth less per m² than main-house floor area. ~18 m² |
£29,424 | £67,500 18 m² · mid spec new build range £54,000–£81,000 |
−£38,076 | 0% (196) |
Two things it cannot see. First, it prices floor area at the local average rate — it doesn't know your plot, your roof, your outlook, or whether an extension is physically possible; nor whether your street has a ceiling price that no amount of extending beats. Second, the rate comes from asking prices of other properties currently for sale, because the Isle of Man's sold register records no floor areas at all — so it reflects what sellers ask, not what buyers paid.
The obvious alternative method is worse, which is why it isn't used here: comparing a typical 3-bed with a typical 4-bed suggests a bedroom is worth around £430,000 island-wide. It isn't — a 4-bed is generally a bigger house on a bigger plot, so that figure measures the mix of what's for sale, not the value of adding a room.
Before spending anything, get a builder's quote and talk to an architect — what work of this kind actually gets approved here shows how often applications like yours succeed, and on what grounds the refusals go.
Building work on this property
Same estimate model this site uses on its planning pages (UK cost ranges with the Isle of Man's 18% uplift) — a rough starting point, not a quote. Always get quotes from an Isle of Man builder before budgeting.
See also all Isle of Man property professionals — architects, surveyors, mortgage brokers and trades.
Sale history
| Sale date | Price | At 2026 prices | Address on register |
|---|---|---|---|
| 2023-11-14 | £470,000 | £523,967 +11% | 6 Castle View Cottage Bank Street Castletown IM9 1AT |
| 2021-06-18 | £230,000 | £280,348 +22% | 6 Castle View Cottage Bank Street Castletown IM9 1AT |
| 2008-05-16 | £245,000 | £349,669 +43% | 6 Castle View Cottage Bank Street Castletown IM9 1AT |
| 2008-01-24 | £443,000 | £632,258 +43% | Castle View Parliament Square Castletown IM9 1LA |
Matched by house name/street and parish against the Isle of Man Land Registry's transaction register — not a unique-ID lookup, so a shared house name could span more than one property. The "2026 prices" column carries each price forward at the island-wide repeat-sales index — it is what that sum of money would be at today's market level, not a valuation of this property, and it takes no account of the condition it was in then or any work done since.
Planning history
No planning application found in this site's planning dataset for this address.
Search the official register for anything since 2023
