BTO renovation cost in Singapore: a 2026 breakdown by flat type

As at 31 July 2026, SparkFlow's published BTO renovation planning ranges run from $25,000–$40,000 for a 3-room flat to $45,000–$70,000 for a 5-room flat. A 4-room sits at $35,000–$55,000. These are SparkFlow guide prices, not an industry-wide benchmark or a substitute for a site-specific quote.

The scope, carpentry quantity, floor and countertop materials, electrical and plumbing changes, access, fabrication lead times and site conditions determine the final number. Use this guide to build a comparison sheet; the signed, line-itemed contract remains the source of truth.

The ranges by flat type

These are SparkFlow's published planning ranges as at 31 July 2026. They assume a defined residential scope and may change after the site survey, selections and approval review.

Executive apartments are older resale stock rather than a current BTO flat type; that row is included only as a larger-home comparison. Within any row, lighter carpentry and standard finishes tend towards the lower end, while extensive built-ins, premium finishes and layout changes can push a quote higher than the guide.

Where the money actually goes

There is no reliable fixed percentage split: two projects with the same total can allocate it very differently. Compare these work sections line by line instead:

• Carpentry — cabinet lengths, laminate, internal fittings and hardware.
• Flooring and wet works — material, substrate preparation, skirting and transitions.
• Electrical — points, circuits, fittings and any work an EMA-licensed electrical worker determines is needed.
• Plumbing — fixtures, supply and waste routes, testing and water-heater connections.
• Painting — surface repairs, primer where specified, number of coats and paint system.
• Protection, disposal, permits or notices, project coordination, cleaning and contingency.

Carpentry is often a major variable because cabinet length, depth, finish, internal organisers and hardware all change the fabrication cost. Ask each tenderer to use the same measured schedule rather than comparing one lump-sum cabinet allowance with another.

Flooring is similarly scope-dependent. Compare supply, substrate preparation, removal or overlay assumptions, trims, skirting and waste; a low material rate is not comparable if the installation scope differs.

What to define in a BTO quote

Contractors package work differently. For each section below, record whether design, supply, installation, testing, protection, disposal and making good are included:

• HDB permit or notice submissions and any stated administration charges.
• Electrical points, circuits and fittings; include a distribution-board change only if the assessed scope requires it.
• Plumbing fixtures, kitchen and bathroom connections, washer point and water heater connection.
• Carpentry dimensions, materials, hardware and internal fittings.
• Flooring areas, substrate preparation, skirting and transitions.
• Painting areas, surface preparation, primer, paint system and coat count.
• Air-conditioning coordination, including who owns piping, drainage, trunking and testing.
• Protection, debris disposal, final clean, handover, defect rectification and any written warranty.

Different contractors include different things, which is part of what makes BTO quotes hard to compare. Always check the line-item scope, not just the bottom-line number.

Purchases that may sit outside the renovation quote

Check these separately instead of assuming the renovation price covers a move-in-ready home:

• Furniture — sofa, beds, dining table, chairs
• Appliances — fridge, washing machine, oven, hob, cooker hood
• Aircon units themselves (we coordinate the install but the units are a separate purchase)
• Curtains and blinds
• Designer light fittings — chandeliers, pendant lights you supply yourself
• Soft furnishings — rugs, decorative items, art

Prices vary too widely for one responsible allowance. Build a room-by-room list with model numbers and current supplier prices, then keep that budget separate from the renovation contract and contingency.

How long it actually takes

Allow roughly 6–10 weeks from finalised design and approvals to handover, then adjust for flat size, fabrication lead times, site access, public holidays and approved variations. A practical sequence is:

• Design, measured drawings, material selection and permit or notice submissions.
• Protection and approved demolition, then concealed electrical and plumbing first-fix.
• Substrate and wet works, flooring and ceilings, followed by carpentry and countertops.
• Painting, fittings, testing, cleaning, handover and agreed defect rectification.

A new flat's defects liability period does not have to expire before renovation begins. HDB states that the DLP lasts one year from key collection; inspect and report defects early, preferably before works obscure the original condition. Read HDB's new-flat defect guidance and coordinate rectification of affected areas before covering them. Design and material planning can happen earlier, but the renovation contractor should confirm when the HDB submission prerequisites are met.

Payment schedule

There is no universal BTO payment schedule. Tie progressive payments to defined, inspectable milestones in the signed contract rather than dates alone. The schedule might separate mobilisation, completed wet works, installed carpentry, practical completion and resolved defects, but the percentages must match the actual job and consumer safeguards.

CASE's CaseTrust renovation-business safeguards use progressive payments and cap the initial deposit at 20% for accredited businesses. Regardless of scheme, pay the contracted entity through a traceable method, obtain an invoice and receipt for each milestone, and never treat an arbitrary deposit percentage as "standard" without checking the contract and accreditation terms.

Can you phase the renovation?

Yes, but phasing can add protection, mobilisation and making-good costs. Design the full layout and routes first, then put disruptive wet works, concealed services and continuous floor finishes in the earliest practical phase. Loose furniture and non-essential built-ins are easier to defer than drainage, wiring or waterproofed work.

Ask for separate phase prices and a combined price. That exposes the cost of returning later and lets you decide whether the cash-flow benefit outweighs duplicated work.

Should you use an ID or go direct?

This depends mostly on how much design help you need.

An interior-design proposal may bundle space planning, drawings, renders, material curation and project coordination. A direct contractor proposal may focus more narrowly on build scope. Neither label guarantees a higher or lower total, so separate design fees, construction work, provisional sums and owner-supplied items before comparing them.

Going direct to an HDB-registered BTO renovation contractor can suit an owner with finalised drawings and selections. If design is still open-ended, price the design and coordination work explicitly rather than assuming it is free in either route.

Where first-timers usually under-budget

These are the cost lines that most catch first-time BTO owners off guard:

Built-in carpentry. If you want full-height wardrobes in every bedroom plus a custom kitchen, get measured lengths, depth, laminate, internal fittings and hardware itemised. Comparing a made-to-measure built-in with a freestanding retail unit is not a like-for-like price comparison.

Electrical points. Adding power points or moving them later is significantly more expensive than including them in the original scope. Walk through every room before signing and map where you'll actually use sockets — including the bedside, TV wall and kitchen counter — then have an EMA-licensed electrical worker assess the circuits and approved load.

Lighting design. Most quotes include basic installation points but not the decorative fittings, drivers, controls or smart-home setup. Mark both supply and installation responsibility for every fitting.

Aircon. Confirm whether the renovation quote includes only coordination and concealment or also the aircon system, standard installation and non-standard piping or access. SparkFlow's current product catalogue starts at $2,499 for a System 3 and $2,999 for a System 4 as at 31 July 2026; the selected capacities, configuration and installation conditions determine the final quote.

Painting. Surface repairs and paint grade can get lost inside a large renovation sum. SparkFlow's current full 4-room HDB repaint range is $1,500–$2,200 as at 31 July 2026, so check whether the renovation line carries the same preparation, areas and paint system as the standalone quote.

HDB registration, permits and electrical work

HDB calls these firms renovation contractors listed in its Directory of Renovation Contractors (DRC). Check the firm in HDB's renovation-contractor directory before signing. The listed contractor submits work that requires an HDB permit; read the official permit application guidance and make approval a written precondition for affected work.

HDB contractor registration is not an electrical-worker licence. EMA says electrical installation work must be carried out or supervised by a licensed electrical worker where required. Verify the individual or firm through EMA's licensed electrical worker guidance and ask who will test and certify the electrical scope.

How we quote

Ask SparkFlow for a site visit and a written, line-itemed proposal once access is available. Confirm the quote turnaround when booking and give every tenderer the same drawings, material schedule and exclusions.

To start, send the flat type, floor plan, target scope, reference images, intended move-in window and budget constraints through our BTO renovation page. Share personal address details only through the booking channel when needed for the site visit.

To summarise

SparkFlow's published BTO planning ranges as at 31 July 2026 are:

• 3-room: $25,000–$40,000 over 4–6 weeks
• 4-room: $35,000–$55,000 over 5–7 weeks
• 5-room: $45,000–$70,000 over 6–8 weeks
• Executive apartment resale comparison: $55,000–$85,000 over 7–9 weeks

Budget furniture, appliances and soft furnishings item by item. Inspect and report new-flat defects early, let the DRC-listed contractor confirm permit timing, and compare the same line-itemed scope across quotes. Keep a contingency for genuine hidden conditions and approve every variation in writing before the related work proceeds.