Guernsey planning applications
3,350 applications from the island's planning register. Search by address, reference or what was proposed.
28 applications matching “BASEMENT”
| Address | Proposal | Reference | Decision |
|---|---|---|---|
| En Facade House La Couperderie St. Peter Port Guernsey GY1 1NH | Variations to previously approved plans to extend at basement and ground floor level with raised terrace area to east (side) elevation. Remove section | FULL/2023/1465 | Notification of Grant of Full Planning Permission. |
| Lasmae Rue De La Haye Castel Guernsey GY5 7QE | Variations to plans previously approved to demolish outbuilding, extend and alter at ground floor, 1st floor and basement level to east (side) elevati | FULL/2023/1539 | Notification of Grant of Full Planning Permission. |
| Tides Ravelin Road St. Peter Port Guernsey GY1 2SW | Demolish outbuilding, extend and alter dwelling at ground and 1st floor level and create a lower ground floor and basement level with associated lands | FULL/2024/0593 | Notification of Grant of Full Planning Permission. |
| 8,10,12 & 42 Commercial Arcade St. Peter Port Guernsey GY1 1LA | Internal alterations to basement and ground floor. Convert first, second and third floors to four flats (Residential Use Class 2) (Protected Building) | FULL/2024/0963 | Notification of Grant of Full Planning Permission. |
| Belvedere House Rue De Belvedere Fort George St. Peter Port Guernsey GY1 2SJ | Variation to previously approved plans to alter ground level and erect retaining wall to create basement light well to east (rear) of property. Altera | FULL/2024/1175 | Notification of Grant of Full Planning Permission. |
| Priaulx Library Candie House Les Vauxlaurens St. Peter Port Guernsey | Internal alterations within basement area. | FULL/2024/1304 | Notification of Grant of Full Planning Permission. |
| Delancey Park House Rue Des Monts St. Sampson Guernsey GY2 4HT | Erect single-storey extension, install roof covering, roof lights and balustrade above existing slab and basement - (Revised scheme) (site of a Protec | FULL/2024/1697 | Notification of Grant of Full Planning Permission. |
| Castaways La Rue Gros Jean St. Martin Guernsey GY4 6EW | Alter roof form, extend and alter at basement and ground floor level with raised terrace areas to west (rear) elevation, install solar panels to east | FULL/2024/1737 | Notification of Grant of Full Planning Permission. |
| Lasmae Rue De La Haye Castel Guernsey GY5 7QE | Variations to plans previously approved to demolish outbuilding, extend and alter at ground floor, first floor and basement level to east (side) eleva | FULL/2024/1785 | Notification of Grant of Full Planning Permission. |
| Montville Manor Montville Drive Colborne Road St. Peter Port Guernsey GY1 1EN | Extend and alter at basement level, erect link extension at ground floor level to west (rear) elevation and alterations to fenestration, balcony and e | FULL/2024/1816 | Notification of Grant of Full Planning Permission. |
| CSL House Pitronnerie Road St. Peter Port Guernsey GY1 2RF | Change of use of basement, ground and 1st floor from mixed use (Sui Generis) to storage and distribution (Use Class 22). | FULL/2025/0579 | Notification of Grant of Full Planning Permission. |
| Treetops Les Grippios Vale Guernsey GY3 5NH | Erect single storey extension and extend raised terrace to south (rear) elevation, alter ground levels at basement floor level and alterations to fene | FULL/2025/1538 | Notification of Grant of Full Planning Permission. |
| Prevoyance Rue De La Perruque Castel Guernsey GY5 7NW | Variations to plans previously approved to demolish existing and erect replacement dwelling - Covered walkway to basement level, alter external stairc | FULL/2025/1588 | Notification of Grant of Full Planning Permission. |
| Delmar House Vauvert St. Peter Port Guernsey GY1 1NJ | Change of use of basement level of outbuilding to residential unit, erect single storey carport to west elevation of outbuilding to west of site (site | FULL/2025/1591 | Notification of Refusal of Planning Permission. |
| Mountville 32 Mount Row St. Peter Port Guernsey GY1 1NT | Demolish extension, porch, and chimneys, infill light well and basement level, erect 2 storey and single storey extension to north (rear) elevation, i | FULL/2025/1627 | Notification of Grant of Full Planning Permission. |
| En Facade House La Couperderie St. Peter Port Guernsey GY1 1NH | Extend at basement, ground floor level with raised terrace area and create terrace at 1st floor level, install replacement balustrade to existing 1st | FULL/2025/1717 | Notification of Grant of Full Planning Permission. |
| White Lodge Les Vardes St. Peter Port Guernsey GY1 1BH | Raise and alter roof ridge height and extend and alter at basement/garage level, lower ground floor, ground floor and 1st floor levels, demolish exist | FULL/2025/1845 | PENDING |
| Castaways La Rue Gros Jehan St. Martin Guernsey GY4 6EW | Raise and alter roof ridge height to create accommodation at 1st floor level, extend and alter basement and ground floors including raised terrace and | FULL/2025/1956 | Notification of Grant of Full Planning Permission. |
| Coup De Coeur Rue De L'Ardaine St. Pierre Du Bois Guernsey GY7 9EU | Extend and alter at basement and ground floor levels, install solar panels to roof, relocate swimming pool and alterations to landscaping. Erect detac | FULL/2025/2003 | Notification of Grant of Full Planning Permission. |
| Saints Farm Icart Road St. Martin Guernsey GY4 6 | Variations to previously approved plans for change of use of agricultural land to domestic garden (4,255sqm), demolish extensions, demolish and rebuil | FULL/2026/0113 | Notification of Grant of Full Planning Permission. |
| Vue Des Iles 22 Hauteville St. Peter Port Guernsey GY1 1DG | Erect two-storey extension (basement and lower ground floor) to east (rear) elevation incorporating balcony and privacy screen wall and erect 3 storey | FULL/2026/0419 | Notification of Grant of Full Planning Permission. |
| 34-36 High Street St. Peter Port Guernsey GY1 2JU | Excavation works and internal alteration to basement level and internal alterations at ground floor level (Protected Building). | FULL/2026/0440 | Notification of Grant of Full Planning Permission. |
| Les Pies Ville Es Pies Vale Guernsey GY3 5NF | Extend at basement and ground floor levels, alterations to fenestration to east (front) elevation and landscaping to create additional parking area. | FULL/2026/0465 | Notification of Grant of Full Planning Permission. |
| Penhill Rue De La Boullerie St. Andrew Guernsey GY6 8XF | Raise ridge height and alter roof form, replace dormer windows, rebuild chimneys, and install light wells and windows to basement level with railings | FULL/2026/0474 | Notification of Grant of Full Planning Permission. |
| Val Au Bourg Saints Bay Road St. Martin Guernsey GY4 6ES | Variation to previously approved plans to demolish existing dwelling, erect replacement dwelling and associated works, infill existing vehicle access | FULL/2026/0954 | PENDING |
| Mountville 32 Mount Row St. Peter Port Guernsey GY1 1NT | Variation to previously approved plans to demolish extension, porch and chimneys, infill light well and basement level, erect 2 storey and single stor | FULL/2026/1025 | Notification of Grant of Full Planning Permission. |
| 6-8 High Street St. Peter Port Guernsey GY1 2LB | Change of use of basement, ground floor and first floor, from use class 15 to general retail (use class 10), second floor retained as admin, financial | FULL/2026/1045 | PENDING |
| Aux Cordiers La Couperderie St. Peter Port Guernsey GY1 1NH | Demolish extension/outbuilding, extend and alter at basement and ground floor levels to west (rear) elevation, erect extension at 1st floor level to s | FULL/2026/1114 | PENDING |
What people apply for, and what gets approved
3,176 decided applications, grouped by what was being asked for. 93% are granted overall — the interesting part is the spread.
| What was applied for | Decided | Granted | Refused | Success rate |
|---|---|---|---|---|
| Extension | 835 | 770 | 51 | 94% |
| Walls, fences and access | 455 | 404 | 43 | 90% |
| Internal alterations | 401 | 375 | 16 | 96% |
| Demolish and rebuild | 296 | 257 | 33 | 89% |
| Garage, annexe or outbuilding | 290 | 263 | 21 | 93% |
| Windows and doors | 250 | 237 | 8 | 97% |
| Change of use | 176 | 145 | 20 | 88% |
| Roof works | 102 | 98 | 2 | 98% |
| Garden building | 88 | 78 | 5 | 94% |
| Signs and shopfronts | 62 | 56 | 3 | 95% |
| Loft or dormer | 59 | 58 | 1 | 98% |
| New dwelling | 49 | 43 | 5 | 90% |
| Trees and landscaping | 31 | 29 | 1 | 97% |
| Two-storey extension | 28 | 25 | 3 | 89% |
| Solar or heat pump | 25 | 21 | 2 | 91% |
| Porch | 22 | 22 | 0 | 100% |
Withdrawn applications are counted in "decided" but never in a success rate — a withdrawal is usually a redesign, not a refusal. Categories are matched from the application's own wording, so a description mentioning two kinds of work lands in the first that fits.
While you are here
What things cost
Which bedroom costs the most in Guernsey?
Going from 4 bedrooms to 5 adds £405,000 to the median asking price — more than any other step on the ladder.
What would make this wrong: A 5-bed house is not a 4-bed house with a room added — it is usually a bigger plot in a different place. This is the price of a different kind of home, not the price of a bedroom.
See what this is built from
History
Has Guernsey property ever actually fallen?
Yes — 2016 was down 4.1% on the year. Across the whole series the index has gone from 100 in 1995 to 591.2, but it has not been a straight line.
See what this is built from
How people behave
How long do people keep a home here?
Half of all repeat sales are 3.1–9.9 years apart, with a median of 5.5 years. That is how often a given address comes back to the market.
See what this is built from
Everything the data says about Guernsey
More ways into Guernsey
Planning records are a paper trail: an approval means permission was granted, not that the work was carried out. Our copy is refreshed nightly (last read 2026-08-20); for the live position on a specific application, go to States of Guernsey planning register.