Can I live in my house during a garage conversion?

Yes — garage conversions are the least disruptive of all home improvements because the working area is sealed off from the main house. We use dust-proof zip walls at the kitchen-to-garage doorway. Noise is mostly during the first 2 weeks (strip-out, blockwork) and is contained within the garage envelope. Most clients report normal daily life with minor disruption.

How long without parking on the drive?

Most garage conversions retain the front driveway parking — only the up-and-over door area is bricked up. You'll lose drive parking for 1–2 weeks during the external infill works (week 6 of the programme) while scaffolding and a small materials zone are required.

Do I need an architect for a garage conversion?

Not usually. Most garage conversions are straightforward enough that a building surveyor or design-and-build contractor (£800–£1,500 for drawings) handles all the design and building control work. An architect is appropriate if the conversion is part of a larger reconfiguration of the ground floor, or if you want bespoke joinery and detailed interior design.

Can two garages be converted at the same time?

Yes — a double garage is converted as a single project, not two. The works run in parallel within the single space. Programme is 7–10 weeks vs 6–8 for a single garage. If you have two separate garages (rare in London), they would be sequential because the labour resource is the same.

Can I move in immediately after handover?

Yes. Builderr only hands over fully finished, building-control-signed-off, snag-free spaces. We complete a 22-point handover checklist covering insulation certificates, electrical certification, ventilation tests, fire safety verification, and decoration. Most clients use the new room the same day.

Garage Conversion Timeline London 2026

How Long Does a Garage Conversion Take?

A London garage conversion takes 6–10 weeks on site in 2026, plus 3–5 weeks of design, building control submission and product procurement. A basic single-garage conversion completes in 6 weeks. A higher-spec conversion with bathroom, kitchenette or detached garage extends to 8–10 weeks. Total programme from contract signing to handover is 9–14 weeks.

Week-by-week breakdown

Weeks 1–3 (pre-site): site survey, structural assessment, design development, LDC application if needed, building control submission, product procurement (window, door, flooring, kitchen if applicable). Week 4: site set-up, skip permit, dust protection, strip-out of garage. Days 1–3 of week 4 strip-out the up-and-over door and clear the slab. Week 5: foundations check, underpinning if needed (allow 5–7 days for concrete cure), floor build-up, DPC, insulation. Week 6: external infill — bricks-up the garage opening, new window install, weathertight. Week 7: first-fix electrics, plumbing if applicable, ceiling work, plastering. Week 8: second-fix electrics, decoration, flooring, doors, skirting. Week 9: snagging, building control sign-off, handover. Builderr publishes a daily schedule for every conversion.

What slows garage conversions down?

Three main causes. First, unexpected foundations issues — older garages frequently have shallow non-residential foundations, and the trial pit reveals the need for underpinning. Underpinning adds 1–2 weeks and £2,500–£5,500. Second, damp survey findings — if the strip-out reveals widespread rising damp or penetrating damp, additional remediation adds 1 week. Third, building control inspection delays — inspectors need 48 hours notice and slot availability; in busy periods (Mar–Jul) inspections can slip by 3–5 days. Builderr books all building control inspections in week 1 of site to avoid programme gaps.

Can a garage conversion be done in 4 weeks?

Yes, but only for the cheapest like-for-like conversion: no foundation work needed, no bathroom or kitchen added, stock window and flooring, single-bedroom or office conversion. A 4-week garage conversion is doable for around £18,000–£22,000 with everything procurement-ready before site start. Conversions with bathrooms, kitchens or underpinning will not finish in 4 weeks. Be sceptical of contractors quoting under 4 weeks for a full conversion — corners are being cut on insulation, electrical certification, or building control.

Express programmes vs sequencing

Express programmes of 4–5 weeks on site are possible with 6-day working, parallel trades and stock products. Expect a 15–20% labour uplift. The risk is that concrete cure times (3–5 days for underpinning, 24 hours for screed, 7 days for full floor cure before flooring) are non-negotiable. Builderr does not offer sub-4-week programmes because the trade-quality risk is too high. We can complete a basic conversion in 5 weeks reliably; anything faster compromises material cure times or finish quality.

Comparison to other room additions

Garage conversions are usually the fastest way to add a habitable room. A loft conversion takes 8–12 weeks on site; a rear extension takes 12–20 weeks; a side return takes 16–24 weeks. Garage conversion at 6–8 weeks is therefore the quickest and cheapest path to one additional room. The trade-off is that garage conversions don't add new footprint — they convert existing footprint — so the value uplift per pound is typically lower than an extension (100–200% ROI for a garage conversion vs 150–250% ROI for a rear extension).