Roseville Street, St Helier
This property's own sale history, 2020–2025
8 recorded sales of this address in the Places.je transaction register (showing the most recent 8 of 26) — matched by house name/street and parish, not a unique property ID, so treat this as a strong likely match rather than a certainty.
| Sale date | Price | At 2024 prices |
|---|---|---|
| 2025-07-25 | £780,000 | — |
| 2025-02-14 | £990,000 | — |
| 2022-08-12 | £1,200,000 | £999,437 -17% |
| 2022-07-22 | £335,000 | £279,010 -17% |
| 2022-05-27 | £550,000 | £458,075 -17% |
| 2022-05-27 | £500,000 | £416,432 -17% |
| 2022-05-20 | £460,000 | £383,118 -17% |
| 2020-06-26 | £730,000 | £820,716 +12% |
The "2024 prices" column carries each past price forward at the island-wide repeat-sales index — the same money at today's market level, not a valuation of this specific property. It takes no account of the condition the property was in at each sale, or any work done to it since.
Not marked as sole agency on the original listing, so this property may also be marketed by other agents not captured in this data.
Getting connected
Jersey has two residential broadband providers: JT — the island's own former state telecom, now Jersey's full-fibre network builder — and Sure, which completed absorbing Airtel-Vodafone's Channel Islands customer base in September 2025 (Airtel-Vodafone no longer trades as a separate operator here). Jersey's copper phone network is largely already history: JT finished building an island-wide fibre-to-the-home network back in July 2018 and has been retiring copper ever since — well ahead of Guernsey, where the equivalent copper switch-off was still under way through 2026. Always confirm actual coverage and switch-over status at this specific address directly with JT or Sure before assuming.
What would improving it be worth?
Modelled for this property in St Helier. Adjust build quality or size for this property
Value added is the extra floor area priced at £7,019/m² — the midpoint asking price per m² among 143 St Helier properties currently for sale that publish a floor area. Cost uses £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 Jersey actually approves that kind of application.
Unlike the value side of this table (priced from Jersey's own current asking prices), the £4k–6k new-build / £2k–4k refurbishment rates are carried across from guernseyproperties.gg, where they were supplied by that site's owner from local Guernsey experience — they have not been independently verified for Jersey, and construction costs plausibly differ between the islands. Treat the Cost and Net columns as an unverified placeholder until a Jersey-specific quantity surveyor's rate replaces them.
| Improvement | Value it might add | Likely cost | Net | Approved |
|---|---|---|---|---|
| Add a bedroom (single-storey extension) A modest double plus circulation, built new. ~14 m² |
£98,261 | £70,000 14 m² · mid spec new build range £56,000–£84,000 |
+£28,261 | 86% (569) |
| 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 |
£140,373 | £60,000 20 m² · mid spec refurb range £40,000–£80,000 |
+£80,373 | 86% (84) |
| Two-storey extension Roughly 14 m² on each of two floors. ~28 m² |
£196,522 | £140,000 28 m² · mid spec new build range £112,000–£168,000 |
+£56,522 | 83% (193) |
| Garage, annexe or outbuilding Detached space is worth less per m² than main-house floor area. ~18 m² |
£75,801 | £90,000 18 m² · mid spec new build range £72,000–£108,000 |
−£14,199 | 82% (216) |
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 that state a floor area — a minority of Jersey's live stock, so treat the sample sizes shown as real limits, not decoration.
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 far more than it actually is — a bigger bed-count usually means 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 — the type-of-work approval rates show how often that kind of application actually succeeds.
Sale history
| Sale date | Price | At 2024 prices | Address on register |
|---|---|---|---|
| 2025-07-25 | £780,000 | — | 25 Roseville Street, St. Helier, Roseville Street, —, St. Helier, St. Helier |
| 2025-02-14 | £990,000 | — | 39 Roseville Street, St Helier, St. Helier |
| 2022-08-12 | £1,200,000 | £999,437 -17% | 35 Roseville Street, ., St. Helier |
| 2022-07-22 | £335,000 | £279,010 -17% | 41 Roseville Street, ., St. Helier |
| 2022-05-27 | £550,000 | £458,075 -17% | 8 Roseville Street, ., St. Helier |
Matched by house name/street and parish against the Places.je property transaction register — not a unique-ID lookup, so a shared house name could span more than one property. The "2024 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.
All 121 recorded sales on Roseville Street
Planning history
| Application | Description | Status |
|---|---|---|
| P/2026/11461 | Remove roof over covered stairway and corridor. Install 3 no. air conditioning units. | Pending Full record |
| P/2025/10405 | Proposed change of use of ground floor shop to residential | Approved Full record |
| P/2025/10199 | Various internal and external alterations to include repairing and refurbishing rear extension roof and replacement shutters. Alter floor le… | Approved Full record |
| P/2025/10183 | Replace roof slates on West elevation. | Approved Full record |
Matched by house name/street and parish against Jersey planning applications decided in the last 3 years — coverage is partial and not a unique-ID lookup.
Estimated cost of live planning permissions
Jersey planning permissions lapse after a set period if unbuilt; these applications fall inside the last 3 years and were not refused, so they are presumptively still capable of being implemented.
- P/2026/11461 — Re-roofing
£15,000–£31,250Remove roof over covered stairway and corridor. Install 3 no. air conditioning units. - P/2025/10405 — Internal alteration / change of use
£18,750–£50,000Proposed change of use of ground floor shop to residential - P/2025/10199 — Single-storey extension
£56,250–£93,750Various internal and external alterations to include repairing and refurbishing rear extension roof and replacement shut… - P/2025/10183 — Re-roofing
£15,000–£31,250Replace roof slates on West elevation.
The work type shown is inferred automatically from the wording of the planning application's own description — it isn't stated by the applicant. The base cost range comes from published UK national renovation/build-cost guides for that type of project, and a ~25% uplift has been added to reflect higher shipping/import and skilled-labour costs in the Channel Islands — this is an estimate, not a published index. These figures are indicative only, not a quote: actual cost depends on specification, finish, ground conditions and the contractor. For anything serious, get a quote from a local quantity surveyor or builder.
Similar properties
Other current rental listings in St Helier, ranked by how many of the reasons on each card it shares with this one (closest asking price breaks ties) — every reason shown is exactly why it's here, not a hidden score.
