How to Schedule a Renovation Project Step by Step

Why renovation scheduling is harder than new construction

On a new build, the site is empty when you arrive and work flows in one direction — from ground to roof, trade by trade. A renovation starts in the middle of someone else's work: existing walls you cannot move without an engineer's sign-off, plumbing routed where you did not expect it, and electrical panels the current tenant needs to keep live while you rewire around them. Add the juristic office approval process common for condominiums and commercial buildings in Thailand — which can run from two weeks to two months depending on the building's management — and the first milestone of your schedule is entirely outside your hands. None of these constraints appear in a standard project plan unless you deliberately build them in before a single worker steps onto the site.

Map authority approvals and juristic timelines before anything else

The first task on any renovation Gantt should not be demolition — it should be "submit juristic approval." For a condo fit-out or any building under a juristic person in Thailand, contractors must submit structural and MEP drawings for review before work begins. Lead times vary: a small cosmetic renovation in a well-managed building might clear in two weeks; a layout change involving structural elements or drainage relocation can take six to eight weeks. Until that approval arrives, nothing structural can move. Mapping this at the top of your Gantt anchors the whole schedule to a realistic start date rather than an optimistic one. If approval arrives early, downstream tasks shift in your favour; if it is slow, you have not already committed your crew to a site they cannot access.

A worked example: 80 sq.m. condo fit-out in central Bangkok

Khun Nattakorn was managing an 80 sq.m. condo renovation near Rama 4 — a 650,000-baht job planned over 10 weeks. He submitted the juristic approval on day one and did not mobilise his crew until day 15 when sign-off arrived. Week 3 was demolition, week 4 MEP rough-in, weeks 5 to 7 wall and ceiling work, week 8 flooring, week 9 furniture and joinery, week 10 punch-list. Because the Gantt linked MEP rough-in as a dependency before wall work, it showed immediately when the electrician ran three days late in week 4 — shifting walls to week 5 and compressing the flooring window. Nattakorn recovered by overlapping flooring with the last day of ceiling work and still handed over on day 70.

How do you sequence work around existing services in the building?

Existing services are the biggest sequencing trap in renovation work. In a new build, MEP runs where the design says; in a renovation, you open a ceiling and find drainage or a cable tray is not where the old drawings show. Every renovation Gantt needs a buffer task labelled "survey and resolve" after the first day of demolition, before MEP rough-in begins. That survey day — where the foreman photographs every deviation from the original drawings — sets the real MEP start date rather than the assumed one. An on-site progress update the moment a deviation is discovered gives the project manager visibility in real time, not two weeks later when the missed dependency has already caused a clash with the joinery team on order.

Four places renovation schedules most often break down

First: no float on the approval chain. Contractors assume approvals arrive in the minimum time; when they do not, the schedule collapses forward. Build at least one week of float after the expected juristic approval date. Second: underestimating the survey. Opening walls and ceilings to check what is actually there takes two to three days on any renovation over 40 sq.m. — not a few hours. Third: parallel trades in a confined space. A 60 sq.m. room cannot absorb an electrician, a plumber, and a plasterer simultaneously. Sequence tightly, stagger by zone, and build handoff checks into the plan. Fourth: mid-renovation scope changes from the owner delivered as verbal instructions on site. Every change, however small, must go through a written process before entering the schedule.

Using the Gantt planning view to manage renovation task dependencies

Renovation dependencies are denser than in a new build because trades work in a smaller space and every team affects the next. In a new build, an electrician running two days late might delay one other task. In a renovation, the same delay shifts plastering, which shifts painting, which delays furniture placement — all in the same three rooms within a single week. A Gantt with linked tasks makes this chain visible the moment any task moves. When you reschedule the electrician's bar, every downstream task recalculates instantly and shows the true new handover date. That dependency visibility turns a three-day slip into a manageable event rather than a hidden problem that compounds quietly into a three-week overrun.

How often should on-site updates happen on a renovation project?

Renovation tasks are shorter than new-build tasks — many run two to five days rather than two to five weeks — which means a weekly update cycle misses most of them entirely. For renovation work, daily or every-other-day updates from the field are the minimum to keep the Gantt honest. A foreman updating percent complete from their phone takes the same ten seconds whether the task is a two-day tile installation or a two-week concrete pour. When on-site progress updates reflect daily site reality, the project manager can see a task finishing early and pull the next one forward — recovering time rather than just recording it lost. In a tight renovation schedule, those recovered half-days compound across the whole project.

Keeping the owner informed through a renovation project

Renovation owners are often more anxious than new-build clients because the work affects their daily life directly — sometimes they are living in the same building. An owner who cannot see what is happening calls the site three times a day; one with a live read-only view calls once a week. The owner sharing link in SiteBoard lets the client watch task progress without needing an account or a login. For renovation work this is especially useful when the approval phase is visible: the owner sees the juristic approval task at zero percent and understands immediately why demolition has not started, without a long explanation. Shared visibility reduces anxiety, cuts unnecessary calls, and leaves a documented record of how the project progressed.

FAQ: How long does a standard condo renovation take in Thailand?

A cosmetic renovation of 60 to 80 sq.m. — new flooring, repaint, kitchen fit-out, and bathroom retiling with no layout change — typically runs eight to twelve weeks including the juristic approval period. A partial layout change adds two to four weeks for engineering review and MEP rerouting. A full gut renovation of the same area, stripping to the concrete shell and rebuilding, runs fourteen to eighteen weeks in a well-managed project. The single biggest variable is how fast the building's juristic office processes the application. Plan for the long end of the range and treat an early approval as a welcome gift to the schedule, not the assumption you price and commit to.

FAQ: What is the most common scheduling mistake in renovation projects?

Not starting the approval process before the crew is ready. The most expensive idle time in any renovation is the days or weeks a team waits for juristic sign-off that the contractor assumed would arrive faster. The fix is straightforward: submit the approval the moment design is finalised, even before the contract is fully signed, and set mobilisation to begin only after confirmation arrives. In the Gantt planning view, the mobilisation task carries a hard dependency on the approval task — no one on the crew starts structural work until it closes green. Every day gained on the approval is a free day on the schedule.