Guide · 5 min read
What a High-End Renovation Timeline Looks Like
The three phases of a serious renovation, what happens in each, and the decisions that keep a programme on track.
“How long will it take?” has an honest answer: it depends on scope, design maturity, approvals, procurement, existing conditions and how quickly decisions are made. The ranges below are orientation, not a promise for a specific property; the project programme should be confirmed from the actual scope before work starts.
Phase 1 — Pre-construction
Design development, structural engineering, planning or permitted-development confirmation, party-wall notices, and specification. It feels slow because nothing is visibly happening — but every week invested here removes two weeks of on-site improvisation later. This is also when long-lead items must be ordered: windows, steels, kitchens and stone all carry lead times that can exceed the build phase itself.
Phase 2 — Primary works
Strip-out, structural alterations, and first-fix services — the unglamorous middle where the property looks worse before it looks better. Progress here is measured in inspections passed: structure signed off, first-fix electrics and plumbing approved, insulation checked. A property that reaches plastering with every inspection passed is a project that finishes on time.
Phase 3 — Finishing
Plastering, second-fix services, joinery, tiling, decoration and commissioning. Counter-intuitively this is the phase most often rushed — and the one your eye lives with every day afterwards. We protect the finishing programme deliberately: it is where a project earns its photographs.
What moves a timeline
- Decision speed. Every unmade choice — tiles, brassware, paint colours — eventually blocks a trade. We give you a decision schedule so choices are made before they are needed, not after.
- Lead times. Bespoke glazing, stone and joinery can run 6–12 weeks. Ordered in pre-construction, they arrive on cue; ordered late, they stall the site.
- Discoveries. Opened-up structures sometimes disagree with the drawings. A contingency plan (and budget) keeps discoveries from becoming delays.
- Weather. Roofs, externals and open structures are hostage to it; we sequence weather-dependent work with float either side.
Smaller projects, shorter clocks
| Project | Typical time on site |
|---|---|
| Bathroom renovation | 2–3 weeks |
| Kitchen renovation | 3–5 weeks |
| Dormer loft conversion | 8–12 weeks |
| Single-storey extension | 10–16 weeks |
| Full-house renovation | See three phases above |
Before you rely on a start date
- Confirm whether planning, building control, party-wall procedures or structural design are still outstanding.
- Identify long-lead items and decide who is responsible for ordering them.
- Freeze enough of the specification that the contractor can sequence trades without waiting for selections.
- Agree which parts of the property must remain usable if the client plans to stay in occupation.
- Record dependencies and client decisions that can move the programme.
Published by Hamiltonn Home Improvement. Updated 9 August 2026. The example durations on this page are planning aids only; a written programme for a real project should be based on its surveyed scope and current procurement/approval position.
We confirm a programme in writing before work begins and report progress against it weekly — if a date moves, you hear it from us first, with the reason and the recovery plan.