Canberra renovation programs fail for reasons that are largely local. Winter stops or slows external work for months. The trade market is small and consistently booked. A lease variation adds a legal process to the planning one. Loose-fill asbestos assessment has to precede everything. And rock, when you find it, adds weeks rather than days.
A related guide to consider while planning this work is How Long Does a Kitchen Renovation Take?.
This guide sets out how long each stage actually takes here, where the time goes, and what can and cannot be compressed.
The Headline Numbers
End to end, from first sketch to moving back in:
- Bathroom renovation: 3 to 5 months total, 4 to 6 weeks on site
- Kitchen renovation: 4 to 6 months total, 7 to 11 weeks on site
- Full internal renovation, no structural change: 7 to 12 months total, 4 to 6 months on site
- Renovation plus ground-floor extension: 14 to 21 months total, 6 to 10 months on site
- Second-storey addition: 18 to 28 months total, 10 to 16 months on site
- Two-dwelling redevelopment with a lease variation: 20 to 34 months total
The construction period is usually less than half the total, and in Canberra the approvals and the builder’s lead time are the bigger halves.
Stage One: Design and Documentation
- Bathroom or kitchen: 2 to 4 weeks
- Internal renovation: 4 to 8 weeks
- Extension: 8 to 16 weeks
- Architect-designed, heritage or two-dwelling project: 14 to 28 weeks
What controls the duration is almost entirely you. Set a decision rhythm at the start — drawings out Friday, comments back Wednesday — and hold it. This is the cheapest time you will ever save.
Stage Two: Investigations
Canberra has more of these than most cities, and missing one is the classic cause of an approval stalling or a budget blowing.
For more detail on this part of the project, see How to Find and Vet a Renovation Builder in Canberra.
- Loose-fill asbestos assessment: 1 to 3 weeks, and it comes before everything else on any pre-1980 house
- Crown lease review: a few days, and it determines whether a lease variation is in the program at all
- Geotechnical investigation and site classification: 1 to 3 weeks. Rock or reactive clay — the largest single footing variable here.
- Detail survey: 1 to 2 weeks
- Arborist report: 1 to 3 weeks, and it needs to precede the design because protected trees and their root zones determine the buildable footprint
- Structural engineering: 2 to 5 weeks after design is settled
- Energy efficiency assessment: 1 to 2 weeks
- Bushfire assessment on the western and southern fringes: 1 to 3 weeks
- Heritage advice where the property or precinct is registered: 2 to 4 weeks
Stage Three: Approvals
Development application, or exempt
- Exempt development. A compliant single dwelling — including alterations and additions — that meets all the development controls and is not inconsistent with the essential design elements needs no DA at all. This is the fast path and it is worth designing to.
- Development application: commonly 8 to 20 weeks, including any public notification and time to respond to representations. Longer where the authority issues a request for further information.
Lease variation
2 to 6 months, running partly in parallel with the DA. Required for anything that takes the block to two or more dwellings, and it triggers the Lease Variation Charge. On a two-dwelling project this frequently sits on the critical path, and it should be started first rather than last.
Building approval and commencement notice
2 to 6 weeks through a private building certifier. Engage them at concept stage rather than at lodgement — they will catch energy efficiency, structural, bushfire and fire separation issues while those are still cheap.
Unit titling
Where two dwellings are to be separately titled, this follows construction and takes several months.
Stage Four: Tender and Contract
- Preparing the tender package: 1 to 2 weeks
- Builders pricing: 4 to 6 weeks. Good Canberra builders will not price a job in a week.
- Comparing and clarifying: 1 to 2 weeks
- Contract negotiation: 1 to 2 weeks
- Waiting for the builder’s start date: 8 to 20 weeks for anyone worth having
That last line is the one Canberra owners underestimate most. This is a small market with a large amount of work, and the builders you want are booked several months out. Building this into the program rather than discovering it is the difference between a plan and a wish.
Stage Five: Construction
A ground-floor extension plus internal renovation, week by week
- Weeks 1–2: Site establishment, tree protection fencing, protection, demolition, waste removal, bonded asbestos removal and clearance
- Weeks 3–6: Excavation and footings. Where rock is present, allow the full four weeks — rock breaking is slow and noisy and often restricted in hours.
- Weeks 7–9: Slab or subfloor, structural steel
- Weeks 10–14: Framing, roof structure, roof covering. Weathertight at the end of this block — the first real milestone, and the one that matters most if winter is approaching.
- Weeks 15–18: Windows and external doors, external cladding or brickwork
- Weeks 19–22: Services rough-in — plumbing with lagging, electrical, data, heating. All trades must finish before anything closes up.
- Weeks 23–26: Insulation and sealing throughout, including the retained house where the envelope is being upgraded, then internal lining and plaster set
- Weeks 27–30: Waterproofing with proper curing between coats, then flood test. Longer in winter.
- Weeks 31–35: Tiling, internal carpentry, doors, skirtings
- Weeks 36–38: Joinery install, then stone template, fabrication and install
- Weeks 39–41: Painting
- Weeks 42–44: Flooring, plumbing and electrical fit-off, appliances, screens and mirrors
- Weeks 45–48: External works, landscaping, certifier’s final inspection, certificate of occupancy, defects and handover
Where the Time Disappears
Winter
The Canberra program variable, and the one most often left out of an optimistic estimate.
- Concrete pours are restricted on frosty mornings and need protection for the first days after placement
- External rendering and painting suffer below a few degrees and many products have a minimum application temperature
- Roofing and external work slow in ice and heavy frost
- Membranes, adhesives, grout and plaster all cure more slowly in a cold room, and a builder working to a tight program has every incentive to move on early. This is where you push back.
- Excavation in saturated ground after winter rain
- Shorter working daylight through June and July
Sequence to be weathertight before winter. Roof on, windows in, before the end of May. This is the single most valuable program decision available on a Canberra build, and it is worth accepting a later start to achieve it.
The Christmas shutdown
The industry closes from around mid-December to mid or late January. A job that would have finished in early December finishes in February.
Procurement lead times
- Windows and external doors: 8 to 16 weeks, and longer for thermally broken double-glazed systems, which are frequently not stock items. The most common cause of a stalled Canberra build.
- Kitchen and joinery: 4 to 10 weeks from sign-off, and Canberra’s joiners are booked ahead
- Stone benchtops: 10 to 18 business days from template to install, and the template cannot happen until the cabinets are in
- Imported tiles: 6 to 14 weeks
- Imported appliances and tapware: 4 to 20 weeks
- Structural steel: 3 to 7 weeks
- Heat pumps and hydronic system components: 4 to 12 weeks
Trade availability
The structural feature of the Canberra market. Every trade is booked, and a gap in the sequence is not filled by calling someone else — it is filled when that trade next has a slot, which may be a fortnight away. This is why decisions made before construction matter more here than in a deeper market.
Rock
Where footings or service trenching hit rock, the work moves from excavation to rock breaking — slower, noisier, often restricted in hours by noise regulations, and three to eight times the cost per cubic metre. Two to five weeks is a realistic addition on a footprint of any size.
Canberra-Specific Delays
- Loose-fill asbestos assessment that comes back positive, which stops the project entirely and changes it into a different question
- Bonded asbestos discovered on demolition — three to seven days including licensed removal and clearance
- Footing redesign after the geotechnical investigation comes back worse than assumed — two to five weeks
- Arborist conditions requiring a design change or supervised excavation
- Lease variation processing on any project adding a dwelling
- Heritage assessment where the property or precinct is registered
- A request for further information on a development application, for a report the controls plainly required
What You Can Compress
- Commission the investigations before lodging — asbestos, geotechnical, arborist, energy. The single largest lever on a Canberra program.
- Design to stay within the exempt development criteria and avoid a development application entirely.
- Start the lease variation first on any project adding a dwelling.
- Make every decision before construction starts.
- Order long-lead items early — windows especially, and book the joiner before the design is finalised.
- Engage the certifier at concept stage.
- Sequence to be weathertight before winter.
- Move out for the intensive phase. Commonly saves 15 to 25 per cent of the construction period, and in a Canberra winter with the heating disconnected it is not really optional anyway.
- Choose materials that are in stock rather than the ones with a sixteen-week lead time.
What You Cannot Compress
- Statutory assessment periods and the lease variation process
- Concrete curing, membrane curing and paint drying — all longer here in winter
- Manufacturing lead times once the order is placed
- Trade availability in a small, busy market
- Winter
- The physical sequence of construction
Living Through It
- Add 20 to 25 per cent to whatever program you are given and plan your life around that number
- Do not plan to live in the house through winter with the heating disconnected. This is a genuinely different proposition from a warm-climate renovation and people underestimate it every year.
- If you are staying in the house, set up a functional temporary kitchen and confirm which bathroom stays operational, heated, and for how long
- Take a rental with a flexible end date, never a fixed one against a construction program
- Do not book the sale campaign, the housewarming or a family Christmas against the contract completion date
- Expect the last 10 per cent to take 25 per cent of the time — fit-off and defects always run long
A realistic program is not pessimism; it is the difference between a project that feels controlled and one that feels like it is happening to you. In Canberra the two decisions that matter most are commissioning the investigations before you lodge, and being weathertight before the end of May.
For the cost side of the same planning exercise, see the Canberra renovation cost guide, and for choosing a builder who will hold a program, how to find and vet a renovation builder in Canberra.
Building a Program You Can Hold To
A program is only useful if it is honest, and most renovation programs fail because they were written as a best case and then treated as a commitment.
How to construct it
- Start from the finish date you need and work backwards. This immediately reveals whether the project is feasible in the time available.
- Identify the critical path. On a Canberra project it usually runs through the asbestos assessment, geotechnical and arborist reports, design, approvals, builder availability, footings, frame, roof, services rough-in, insulation and sealing, waterproofing, tiling, joinery, stone, fit-off — with the lease variation on it wherever a dwelling is added.
- Put long-lead items on the program as orders, not deliveries. Thermally broken double-glazed windows ordered in week four arrive in week eighteen.
- Add float in blocks, not per task. Three weeks after approvals and four weeks before the finish date is more useful than three days sprinkled across forty activities, because sprinkled float is consumed invisibly.
- Mark the immovable dates — the end of May for weathertightness, the Christmas shutdown, a lease expiry.
- Review it fortnightly with the builder against actual progress, not intended progress.
Early warning signs
- A trade did not start on the booked day and no replacement date has been given — in a small market this is more serious than elsewhere
- A variation has been discussed but not priced
- A long-lead item has not been ordered by the week the program says it should have been
- The site is quiet for more than three consecutive working days without explanation
- A selection is still open two weeks before the trade needs it
- The roof is not on and it is the middle of May
Sequencing an Envelope Upgrade Into the Program
Canberra renovations carry a work package most cities do not, and where it sits in the sequence determines both the cost and the result.
The order that works
- Loose-fill asbestos assessment before anything opens. Nothing proceeds until this is clear.
- Ceiling insulation and roof space work at the roofing stage, while access is unobstructed and before ceilings are relined
- Underfloor insulation and pipe lagging during the replumb, while the subfloor is being worked in anyway
- Wall insulation and thermal breaks before internal lining, which is the only practical window
- Draught sealing at two points — the structural penetrations during rough-in, and the finish-level sealing at fit-off
- Blower door test before linings close on a high-specification job, so leaks can still be found and fixed
- Windows as early as the program allows, because they are the long lead item and the house is not weathertight without them
- Photograph all of it before it is covered. This is the evidence that the envelope was built as specified.
Retrofitting any of this after linings are on costs several times more and usually cannot be done as well. A builder who treats the insulation and sealing as a fit-out item rather than a structural sequence item has misunderstood the project.