Direct guidance for homeowners planning substantial residential work in London and Hertfordshire.
A well-specified London house extension commonly falls between £120,000 and £250,000 including VAT, depending on size, structure, access and the internal finish. Larger schemes that include extensive remodelling, bespoke joinery or complex glazing can exceed this range.
A rear extension usually takes around five to eight months on site. A typical loft conversion takes around three to five months, while structural complexity, planning conditions and specialist finishes can extend the programme.
Planning permission is formal approval from the local authority for work that falls outside automatic development rights. Permitted development allows certain changes without a full planning application, but limits and exclusions still apply, so the design should be checked before work starts.
FMB membership means the building company has passed the Federation of Master Builders' vetting process and agrees to follow its code of practice. NICEIC registration means electrical work is carried out by a contractor whose competence and compliance are independently assessed.
Yes. Once the design, specification and site conditions are sufficiently defined, AT Bespoke provides a detailed fixed-price contract; client changes and genuinely unforeseen work are agreed in writing before the cost changes.
AT Bespoke works across North, North West and West London and selected Hertfordshire locations. Core areas include Colindale, Hendon, Mill Hill, Edgware, Finchley, Barnet, Golders Green, Muswell Hill, Hampstead, St Albans, Harpenden, Wheathampstead, Ealing and Queens Park.
The process starts with an initial enquiry and site assessment, followed by scope review, specification and a detailed quotation. Once the contract and programme are agreed, AT Bespoke manages construction, regular communication, quality checks, completion and final handover.
Review typical budget ranges, then discuss the scope and site conditions with AT Bespoke.