Choose a renovation date for the first real, permitted work that begins changing the home. Do not automatically reuse it as the 入伙 (moving into a brand-new home) date: construction and household occupation are different events, often separated by weeks or months.
The practical order matters. A date can fit the traditional method and still be unusable if defects have not been checked, a required permit is pending, the contractor cannot begin, or HDB rules do not allow the planned work at that time.
Decide what “start renovation” means for this project
A renovation has several beginnings: the first designer meeting, contract signing, site measurement, permit approval, material delivery, protective covering, and physical work. They are not interchangeable.
For date selection, use the first day of actual work that your household and contractor genuinely treat as commencement. If the project includes hacking, drilling, removing finishes, or constructing new elements, that first physical intervention is a clearer renovation milestone than an earlier consultation or paperwork date.
Not every interior project literally breaks ground. Auspio's shipped category is Construction in English and 动土 (commencing construction work) in Chinese. It is the closest category for renovation commencement, but the name should not be stretched to suggest that signing a quotation or receiving drawings is physical construction.
Check the flat before work begins
For a newly completed HDB flat, the first priority after key collection is not choosing a contractor's opening day. It is checking the flat and reporting defects.
HDB's current guidance on defects in new flats says the one-year Defects Liability Period begins on the key-collection date. It also advises owners to report defects within one month of key collection and before renovation starts, so it is easier to determine whether an issue came from the original construction or later renovation work.
That creates a sensible sequence:
- Collect the keys and inspect the flat.
- Report defects and allow for rectification where needed.
- Confirm the renovation scope and whether permits are required.
- Identify the contractor's genuine first workdays.
- Compare those workable dates.
Skipping directly to a preferred calendar date can put the sequence backwards. The home needs to be ready for work before the date can mean anything operationally.
A chosen date does not replace HDB approval
Some renovation work requires an HDB permit and some does not. HDB's renovation permit page directs owners to the applicable guidelines and says contractors submit proposed plans for work that HDB must evaluate, such as certain wall demolition.
HDB's important renovation information also says a new flat needs an active utilities account before a renovation permit can be granted. Once a permit is issued, the Notice of Renovation must be displayed outside the flat during the works.
The same guidance says neighbours within a radius of two units should receive written notice at least five days before renovation begins. That notice period belongs in the schedule before the selected start date, not after it.
If the planned work requires approval, the honest shortlist contains only dates after approval and notice can be completed. Date selection cannot turn a pending permit into permission to begin.
Choose a day the contractor can actually use
HDB currently limits general renovation work to 9:00am–6:00pm on weekdays and Saturdays, with no renovation on Sundays or public holidays. Noisy work such as hacking, removing finishes, tile cutting, and heavy drilling is limited to 9:00am–5:00pm on weekdays, and is not allowed on weekends, public holidays, or the eve of specified major public holidays.
This changes what counts as a viable renovation start. If the intended first action is noisy work, a Saturday cannot become the real commencement merely because it looks suitable in a date finder. If the contractor can only deliver materials that day and begin physical work on Monday, decide which action you are actually timing instead of quietly moving the meaning.
A practical shortlist should therefore satisfy all three conditions:
- HDB permits and notice requirements are complete.
- The planned work is allowed on that day and at that time.
- The contractor has confirmed that the work will genuinely begin.
Only then is there a meaningful set of dates to compare.
Renovation and move-in use different event logic
Auspio's source treats Construction / 动土 and Moving / 搬家 as separate event types. That separation is visible in the 12 Day Officer ratings: the same officer can carry a different score depending on the activity selected.
For example, the current source gives 定 (Stable) a stronger rating for Construction than for Moving, while 建 (Establish) rates more strongly for Moving than for Construction. 成 (Success) is highly rated for both. These are classifications within the method Auspio implements, not predictions about the result of a project.
The app also shows a construction-only annual direction notice for 三煞 / 太岁 (Three Sha / Tai Sui), describing directions traditionally avoided for groundbreaking work. Moving has a different implementation: when a house facing and moving household are supplied, it applies moving-specific household and facing checks.
The broader calculation combines the selected activity's Day Officer rating with zodiac relationship, element harmony, lunar-month cautions, and personal affinity. The method is documented on How Auspio Calculates Your Dates.
The distinction is useful because a renovation contractor beginning physical work is not the same action as a family beginning to live in the completed home. One date starts a project; the other starts occupancy.
Plan the two dates as a sequence
Start with the renovation date because it depends on approval, defect rectification, contractor availability, and permitted working times. Treat it as the first controlled action in the project.
Choose the move-in date later, once the work programme is stable enough to give the family a realistic window. That date should reflect the household's first formal occupation rather than a completion estimate that may move.
If the project finishes early, the family can still keep the planned 入伙 date. If the works are delayed, it is better to revise the move-in plan openly than pretend the original renovation date also covered an event that has not happened yet.
This is what deliberate date selection looks like in practice: define the event precisely, respect the constraints around it, and choose within the dates that can genuinely carry that meaning.
Is the renovation date the day I sign the contract?
Usually not. Contract signing, design approval, and permit approval prepare the project; the renovation start date is more clearly the first day of actual work that the household and contractor treat as commencement.
Should I inspect a new HDB flat before renovation starts?
Yes. HDB advises owners of newly completed flats to report defects within one month of key collection and before renovation begins, where possible, so defects can be distinguished from issues caused by later works.
Can renovation start before the HDB permit is approved?
Work that requires a renovation permit must not start before HDB approval. Check the rules for the exact scope, because some work requires a permit while other work does not.
Should renovation and 入伙 use the same date?
Not automatically. Renovation commencement is a construction event; 入伙 is the household's first formal occupation of the completed home. Auspio exposes them as Construction / 动土 and Moving / 搬家, with different activity logic.
Which Auspio event should I choose for renovation?
Use Construction / 动土 for the first real renovation work. Use Moving / 搬家 separately for the household's later move-in or 入伙 date.