03 · Design
How long does the design phase actually take?
Three to six weeks from first showroom appointment to signed-off specification, with a draft 3D render typically ready within 1–2 weeks of the measure visit. Total designer time across the period is 8–15 hours for a standard luxury bathroom. Bespoke principal suites with custom joinery push that to 18–25 hours.
The clock starts ticking at the first showroom appointment. That visit is 60–90 minutes; the designer takes the brief, walks you through brand options at your spec level, and gives you a rough budget calibration. The site measure follows in week 2 — typically a 90-minute visit with the designer and a tape measure, laser measurer, joist probe, and a notepad recording soil-pipe positions, supply pressures, ceiling heights and window reveals.
The CAD layout and 3D render are produced in weeks 3–4. This is the longest single design output — it is where the room gets drawn at scale, every fitting placed against actual joist runs and supply lines, every brassware code matched to actual water pressure, every cistern measured against actual recess depth. The 3D render is the part clients enjoy most, but it is the spec sheet that prevents the install-day failures — 60–120 line items for a standard luxury bathroom, every one a decision the designer has made on your behalf.
Two to three revision rounds is normal. The first round fixes the things you did not know you cared about until you saw them in 3D (the towel rail position, the basin centre line, the shower glass opening direction). The second round fine-tunes finishes — the brassware finish, the tile colour, the grout tone, the silicone shade. The third round, if it happens, is final price calibration: removing items to hit budget, or upgrading items where the budget stretches.
Sign-off is the moment the design phase ends and the order phase begins. It is also the moment the spec sheet stops being editable without consequence — every change after sign-off has a cost, either in revision time, restocking fees, or lost lead-time slots with manufacturers. The decisions that fill those 3–6 weeks of design phase are documented step-by-step in our designer's 14-step planning checklist — useful as a reference for what should be locked before sign-off.