Building services in Pinner
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Pinner
| Project | Guide range (inc VAT) |
|---|---|
| Kitchen extensions | £2,900–£4,400 per m² including a mid-range kitchen |
| Hip-to-gable loft conversions | £71,500–£101,500 for a hip-to-gable with rear dormer |
| Garage conversions | £23,500–£39,000 for a single integral garage |
| Structural alterations and knock-throughs | £5,750–£12,500 for a typical knock-through with steel beam |
| Porches | £8,500–£21,000 from a 3 m² porch to a small front extension |
| Orangeries | £3,100–£4,400 per m² of floor area |
Building costs in London run about 30% above the UK average, and the figures for Pinner are adjusted to reflect that.
Planning permission in Pinner
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
About building in Pinner
Victorian and Edwardian terraces dominate many London streets, which is why side return, wraparound and mansard projects are so common here.
Our Pinner coverage includes postcode districts HA5, and we also work in nearby places such as Ruislip, Harrow and Northolt.
How it works
- 01
Free visit
We look at the property, talk through what you want and measure up. There is no charge and no obligation.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions from homeowners in Pinner
How much does an extension cost in Pinner?
A single-storey extension in Pinner typically costs £2,550–£3,750 per m² of floor area, and a double-storey extension £2,150–£3,250 per m² of floor area (both floors), including VAT.
Do you work in Pinner?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Pinner, including postcodes HA5.
Do I need planning permission for an extension in Pinner?
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
How much does a loft conversion cost in Pinner?
A rear dormer loft conversion in Pinner typically costs £62,500–£88,500 for a typical rear dormer with en-suite, including VAT.
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.