Free site visit - call 020 7476 2770






New Door & Window Openings in London
Moving a doorway, widening an opening or adding garden doors means cutting into structure. We size the lintel or beam, get approval where needed, and make good so the new opening looks original.
Since 2013 · Fully insured · CSCS-carded, SMSTS-supervised · Free site visit and itemised written quote
What's included
Structural check and lintel sizing
Building Control where required
Temporary support and opening formation
Lintel or steel beam installation
Frames, plastering and making good
Price and time on site
Priced after a free site visit, with an itemised written quote.
Questions we're often asked
Does a new internal doorway need approval?
In a load-bearing wall, yes. In a stud wall, usually not. We check which it is.
Can a window become French doors?
Often yes, by lowering the opening with a new lintel and frame.
Other structural works services
Wall removal & RSJ · Chimney breast removal · All structural works
Often done together
Internal doors · Garage conversions · Wall removal & RSJ
Back to all domestic services.
Get a free quote
Send us your postcode and a few photos, or call 020 7476 2770 / 07903 854379. We'll arrange a free site visit and send an itemised written quotation. Get a free quote
© 2026. All rights reserved. Sharp Line Construction Ltd (trading as Sharpline) | Reg. Office: Chichester Close, London E6 5QJ | Company number 08639916 | VAT Reg. No. 426893265 | Privacy Policy
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