HDB floor plan purchase is done online, through HDB's Purchase of Residential Floor Plan e-Service, at S$5 per unit floor plan including GST. Anyone can buy one for an existing flat. The plan arrives as an A4 PDF at 1:100, immediately or within 3 working days. It shows the flat as HDB built it, not later renovations. Private property is a different agency entirely.
This page is the reference: what exists, what it costs, what it shows. If you want the click-by-click procedure, use how to get an HDB floor plan instead.
What an HDB floor plan shows
The unit layout as constructed: room arrangement, the position of the walls HDB built, and the overall footprint of the flat. It is a record of the original build, held by the authority that built it. That makes it authoritative about one thing and silent about another.
What it does not show is anything done to the flat afterwards. Every wall a previous owner moved, every false ceiling, every wardrobe built into a recess: none of that reaches the archived plan. HDB is not maintaining a live model of your flat. It is holding the drawing of the flat it handed over.
HDB's own terms and conditions are explicit on the limits. Renovation undertaken by the flat owner, and recess area bought by the owner, will not be shown on the plan. The plans are provided "as is" and are "to be used only as a guide". HDB owns the copyright, and the plan may not be reproduced or published without HDB's written consent. The service is also not available for a flat still under construction, or one undergoing an improvement or conversion scheme.
The drawing itself is an A4 sheet at a scale of 1:100. Printed at "Actual Size", it scales correctly, which is enough to plan furniture or brief a designer. It is not a dimensioned survey, and HDB does not present it as one.
HDB flat or private property? Different agency, different fee
This is the distinction that sends the most people to the wrong website. HDB flats go through HDB. Private property goes through BCA, and to URA for planning records. Neither agency will serve the other, and the fees are not in the same league.
| Your property | Where the plan sits | Published fee |
|---|---|---|
| HDB flat | HDB, Purchase of Residential Floor Plan e-Service | S$5 per copy of floor plan per unit address, GST included |
| Private condo or landed: approved building and structural plans | BCA, Plan Purchase System | S$45 per address to search, then S$65 per plan reference number, both inclusive of GST |
| Private condo or landed: planning records | URA, Buy Planning Records (DC 15) | S$109 search per application inclusive of 9% GST, then S$27.25 per set of approved plans or Grant of Written Permission |
The order of magnitude is the memorable part. An HDB flat's floor plan is a single-digit-dollar purchase. A private property's approved plans are a three-figure purchase before you have received anything. There is no such thing as one government search fee for property plans. The BCA route is set out in full in BCA plan purchase, and if you are dealing with a condominium unit specifically, condo floor plans in Singapore maps the four possible routes to the document you actually need.
How to buy an HDB floor plan
The floor plan is sold only online, through the Purchase of Residential Floor Plan e-Service. Everything below is from HDB's get help page and terms and conditions, checked on 2 October 2026.
| Question | HDB's answer |
|---|---|
| Fee | S$5 per unit floor plan, inclusive of GST. HDB may revise fees. |
| Who can buy | The public. The e-Service "allows the public to purchase the floor plans" of existing flats. |
| What you provide | Purchaser's name, contact number, the flat address(es), email address, and a Visa or MasterCard |
| From overseas | Allowed, but you must give a local contact number and a valid email address |
| Plans per application | Up to 5 addresses; submit another application after the first completes |
| Delivery | Download immediately after payment if available, otherwise emailed as a PDF within 3 working days |
| Format | A4, scale 1:100 |
| Receipt and refund | No receipt is issued; keep the acknowledgement page. No refund once paid, except case by case on a claim within 2 weeks. No refund for a wrong address or email. |
| Not available for | Flats under construction, or undergoing an improvement or conversion scheme |
Two practical points. Type the address exactly, block, street and unit number, because a wrong address is not refunded. And if nothing has arrived after 3 working days, email hdb_sop@hdb.gov.sg with the order reference number from your acknowledgement page. If you bought a new flat, check your Sales Brochure first: HDB's renovation guidance says the floor plan given at flat selection can be used. The click-by-click walkthrough is in how to get your HDB floor plan.
Why you probably need it: the renovation permit
Renovation is the main reason a flat owner goes looking for the plan, and HDB is explicit about why. On its renovation permit page, HDB states: "Renovation contractors are to submit to HDB, the flat's floor plan showing the proposed work, together with the electronic application for renovations."
Two things follow from that sentence. First, the permit application is submitted by your renovation contractor, not by you. Second, the contractor cannot submit it without a floor plan to mark up, which is your side of the job. If your renovator asks you for the plan on the day the quote is due, this is why. Which works need a permit, the hacking hours and the penalties are covered in the HDB renovation permit.
Structural walls, and what HDB actually evaluates
HDB states that all demolition and hacking of walls, partial or complete, needs its prior written approval, and that structural members, meaning reinforced concrete walls, columns, beams and slabs, may not be hacked at all. Non-structural partitions can be removed only up to the underside of the beam or slab. The floor plan is where your contractor marks which walls the work touches, and HDB evaluates the application against it.
The plan alone will not settle every case, particularly in a flat where earlier owners have already altered walls. Your contractor must confirm the position for your specific flat with HDB before any hacking is priced or started.
When the HDB plan is not enough
For the overwhelming majority of readers it is completely sufficient, and we would rather say that than sell something. Buy the plan, hand it to your contractor, get the permit. If you are renovating a normal flat and the layout matches what you see, you are done and there is nothing further to buy.
The narrow cases where measurement rather than an archive is the answer:
- Previous owners have renovated and you need the current layout, not the original. Fitted carpentry is the usual trigger, because a centimetre of error in a recess is expensive, as is a dispute about what was altered and when.
- You need verified dimensions or areas, rather than the schematic layout an archived plan gives you.
- Maisonettes, jumbo flats and converted units, where the record may not reflect the merged or altered unit at all.
- Commercial or institutional HDB property, and HDB shophouses or commercial units undergoing A&A works, where a Qualified Person needs existing-condition drawings to design and submit against.
In those cases the deliverable is a measured record of the unit as it stands. 3D laser scanning captures it, and as-built documentation turns the capture into a dimensioned plan set. That is a drawing service and nothing more: it does not replace a Qualified Person's submission to the authority, a Professional Engineer's structural assessment, or a Registered Surveyor's endorsement of boundary or strata area. Those roles stay where the law puts them. If the archived plan and your flat disagree, the wider problem is set out in what to do when the floor plan is missing or wrong, and you can always describe the flat and what you need drawn before committing to anything.
Rule of thumb: buy the plan first. If it does not match what you are standing in, that is the moment measurement becomes the answer, and not before.