What is a glazed extension?
A glazed or contemporary extension uses large panes of glass, slim aluminium frames and modern cladding to create a bright room that contrasts with the original house. Frameless corners, structural glass roofs and minimal sliding doors are typical features.
How much does a glazed extension cost in Lofthouse?
In Lofthouse, a glazed extension typically costs £2,600–£3,900 per m² of floor area, including VAT at 20% (standard rate). For a typical 18 m² project that is roughly £47,000–£70,000. Building costs in Yorkshire and the Humber run about 7% below the UK average, and the figures for Lofthouse are adjusted to reflect that. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| Smaller project (13 m²) | £34,000–£50,500 |
| Typical project (18 m²) | £47,000–£70,000 |
| Larger project (25 m²) | £65,000–£97,500 |
| Rate per m² | £2,600–£3,900 |
The main things that change the cost:
- Overheating and energy design
- Access for large glass panels
- Glazing size, specification and lead time
- Lighting and finishes
For a figure based on your own measurements, try the guide price tool, then book a free home visit for a fixed quote.
Do you need planning permission for a glazed extension in Lofthouse?
Before anything is built in Lofthouse, we confirm which approvals apply in England. 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.
We check this for your address before design work starts, so there are no surprises later.
What we handle
The work we manage on a glazed extension:
- Structural design for steel frames and glass supports
- Energy and overheating calculations where needed
- Building control sign-off
- Electrics, heating and finishes
- Large-format sliding doors and fixed glazing
- Cladding or render finish
How long does it take?
Allow 12 to 16 weeks on site; glazing lead times can be 6 to 10 weeks. Allow time beforehand for drawings and approvals, usually 3 to 4 months.
Building in Lofthouse
In Yorkshire, through-terraces and back-to-backs have particular constraints, while semis and detached houses suit larger extensions.
We work across Lofthouse and neighbouring areas such as Wakefield, Morley and Ossett. Postcodes we cover in Lofthouse include WF3.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions about glazed extensions in Lofthouse
Is triple glazing necessary?
Not always. High-performance double glazing can meet the standards; triple glazing helps in exposed locations.
How long do large glass panels take to arrive?
Often 6 to 10 weeks after final measurements, so we order them as soon as the structure is built.
How much does a glazed extension cost in Lofthouse?
In Lofthouse, a glazed extension typically costs £2,600–£3,900 per m² of floor area, including VAT at 20% (standard rate). A typical 18 m² project comes to roughly £47,000–£70,000. Your fixed price depends on the survey and drawings.
Is VAT charged?
Yes, VAT at the standard 20% rate applies to extensions. Our guide prices include it.
Do you build glazed extensions in Lofthouse?
Yes. We build glazed extensions across Lofthouse, including postcodes WF3. Every project starts with a free home visit.