When is an extension renovation the right choice?
An extension renovation is the right choice in Glasgow when the household needs more floor area, wants an open-plan kitchen-diner, or has hit the ceiling of what the existing footprint can deliver.
It is most common on Southside and West End semi-detached homes with rear garden depth, and on ground-floor tenements with garden rights. Upper-floor tenements can rarely extend.
What consents does a Glasgow extension need?
A Glasgow kitchen extension needs a Building Warrant from Glasgow City Council in every case, planning permission where it falls outside Permitted Development, and factor consent when it affects shared walls or drains.
See Scottish Government planning permission guidance for the current size, height and location limits. Conservation areas and listed buildings do not benefit from PD rights.
How does an extension renovation run week by week?
A Glasgow extension renovation runs weeks 1–3 groundworks and foundations, weeks 4–6 shell and roof, weeks 7–8 glazing and weathertight, weeks 9–12 first fix and kitchen fit, weeks 13–16 second fix, snag and handover.
Off-site kitchen manufacture happens during weeks 4–9 and lands on site as the shell reaches weathertight. Delaying the kitchen order to shell-complete adds 4–6 weeks to total programme — a common rookie mistake.
Do you need to move out during an extension renovation?
You often need to move out of a Glasgow home during the strip-out and shell weeks of an extension renovation, then move back in for the kitchen fit-out phase.
Most families rent nearby or stay with relatives for 3–6 weeks during the disruptive phase. Budget £1,500–£3,500 for accommodation on top of the build cost. Our fitters will help stage the programme to minimise the away-from-home window.
What's the resale uplift on an extension renovation?
A Glasgow kitchen extension renovation adds £30,000–£80,000 to the resale value of a family home in Southside, Bearsden or the West End, often exceeding 100% of the outlay.
The uplift is driven by the extra floor area moving the property into a higher price band — 3-bed to 4-bed effective, or standard-plan to open-plan. Kitchens designed for the marketed photographs — bifolds, island, roof lantern — outperform the average.
Kitchen extension renovation cost breakdown
| Line | Typical cost | Notes |
|---|---|---|
| Structural drawings & Warrant | £1,500–£3,500 | Structural engineer + BSA fee |
| Extension shell | £25,000–£45,000 | £2.5k–£3.5k per m² typical |
| Kitchen fit-out | £15,000–£30,000 | Cabinetry, worktops, appliances |
| Glazing (roof lantern / bifolds) | £4,000–£10,000 | Optional but common |
| Landscaping make-good | £1,500–£4,000 | Rear garden reinstate |