The mistake that blows up most pre-DA budgets
Most budgets unravel because people ask for a fixed number before they have a fixed design. That sounds obvious until you see how often it happens. A homeowner in Annandale gets a sketch, lodges a development application, then discovers the “budget” never included the real cost of consultant coordination, redraws, structural changes, or the work needed once the approvals drawings are finalised.
That is the wrong place to be arguing about money.
The better question is this: What scope should be included in a preliminary quote before lodging a DA so the budget doesn’t unravel once the approvals drawings are finalised? The answer is not “everything” and it is not “as little as possible”. It is a defined package of work, with clear exclusions, provisional allowances where the design is still fluid, and wording that tells you exactly what has been priced and what has not.
Key takeaway: A good pre-DA quote prices the knowns, isolates the unknowns, and names the redraw risk before anyone lodges a DA.
What should be in the preliminary quote
A proper preliminary quote before DA should cover the work that is real, measurable, and unlikely to change just because council asks for another note or a consultant tweaks a detail.
That usually includes:
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Initial site and existing conditions review
- A walk-through or site inspection
- Basic measure-up
- Photos of the existing house and access
- A read of obvious constraints, like tight side access, boundary issues, or heritage fabric
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Concept coordination
- Review of the architect’s or designer’s concept
- Input on buildability
- Early flagging of cost drivers, such as steel, excavation, waterproofing, fire separation, or difficult access
-
Pre-DA estimating
- A budget range or preliminary estimate based on the concept set
- Separate allowances for major unknowns
- A clear list of assumptions
-
DA support that is genuinely needed now
- Builder input into constructability notes
- Simple clarification sketches where required
- Coordination with the architect, engineer, and other consultants around obvious build issues
-
A defined allowance for design development
- Time for one or two rounds of reasonable iteration
- Not unlimited redesign
- Not all consultant work folded into one lump sum
If you are asking what scope should be included in a preliminary quote before lodging a DA so the budget doesn’t unravel once the approvals drawings are finalised, this is the core of it. Price the work needed to get the project to the point where the design can be costed properly. Do not pretend the final drawings already exist.
For projects in Balmain or Birchgrove, where access, terrace party walls, and heritage constraints can change the build method, that distinction matters even more. A quote that ignores those conditions is not conservative. It is incomplete.
What to leave out on purpose
A lot of builders try to sound helpful by including everything. That is how they end up wearing the cost of changes that were never locked down.
Leave these out of the preliminary quote, or make them provisional:
- Final selections for finishes, tapware, tiles, joinery hardware, appliances
- Exact structural steel sizes if the engineer has not finalised them
- Hydraulic, electrical, and mechanical details that depend on the final layout
- Heritage and council condition responses that may force redesign
- External works that depend on survey, drainage design, or stormwater approvals
- Any documentation that will almost certainly need to be redone if the design changes
- Full contract administration beyond the pre-DA stage
That last one is the hidden trap. The real cost in pre-DA quoting is not the first estimate. It is the coordination time, the revisions, the client delay while they decide between options, and the second or third pass after council or consultants push back. Most practices underprice that work because it is messy and hard to explain.
If you do not name it, you will absorb it.
What is safe to lock in, and what should stay provisional
Some parts of the scope are stable early. Others are not. Treat them differently.
| Scope item | Safe to lock in pre-DA? | Best treatment | |---|---:|---| | Site inspection and measure-up | Yes | Fixed fee | | Concept review and buildability input | Yes | Fixed fee | | Preliminary cost plan | Yes | Fixed fee | | DA support for current concept | Mostly | Fixed fee with stated assumptions | | Structural design | No | Provisional allowance until engineer finalises | | Hydraulic and electrical layouts | No | Provisional allowance | | Joinery and finish selections | No | Exclude until design development | | External works and landscaping | Usually no | Allow separately or exclude | | Redraws after council comments | No | Charge separately or cap by number of rounds |
The safest things to lock in are the things you can actually see and measure now. The most dangerous things to fix too early are the parts that depend on approvals drawings finalised later, because that is where the scope creep starts.
A fixed preliminary quote should not pretend every decision has already been made. It should say, plainly, “this is the cost to get from concept to lodgeable DA based on the current brief, with these allowances and these limits”.
That is what a quote you can actually read looks like.
How to word it so people are comparing like with like
This is where a lot of quote comparisons fall apart. One builder prices the concept review only. Another includes redraws, consultant coordination, and two rounds of revisions. Both numbers look neat. They are not comparable.
If you are comparing builders or consultants, ask them to spell out:
- What drawings were reviewed
- What assumptions were made
- How many revision rounds are included
- Whether consultant coordination is included
- Whether DA resubmission changes are included
- Whether the quote includes only pre-DA work or also post-approval documentation
- What happens if council asks for changes
The wording matters. A proper architect quote scope or builder pre-DA estimate should separate:
- Base scope
- Allowances
- Exclusions
- Variation triggers
That is the only way to stop the “but I thought that was included” argument later.
If you are dealing with a renovation in the Inner West, especially a period home in Annandale, the same rule applies. The council process is not the only variable. Hidden structure, old services, and mismatched levels between old and new work can change the job after the concept stage. If the quote does not say how those risks are handled, it is not a proper comparison.
The biggest gap that blows the budget after approvals
The most common gap is this: the pre-DA quote covers the pretty part of the design, but not the cost of making it buildable.
That usually shows up as:
- structural steel that was never fully allowed for
- retaining, excavation, or drainage that appeared late
- fire and acoustic upgrades once the final use or boundary condition is confirmed
- service upgrades, especially electrical capacity and plumbing reroutes
- council or consultant conditions that force a redraw
- access solutions on tight blocks that were assumed, not costed
On a difficult site, especially in places like Rozelle or parts of Birchgrove, the cost can move quickly once access, neighbour protection, and sequencing are known. Renovate8 has had to plan jobs backwards when access disappears later. That is not a theoretical issue. It changes what goes in first, what can be prefabricated, and what has to be allowed for in the budget from day one.
Key takeaway: The budget usually breaks not on the concept itself, but on the work needed to turn the concept into something council, engineers, and trades can actually build.
How to handle redraws and resubmission risk
If council or consultants force design changes, do not bury that cost inside a vague allowance and hope for the best.
Use one of three methods:
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Fixed fee for the current scope, variations for redesign
- Best when the concept is fairly settled
- Clearest for the client
- Cleanest for you
-
Fixed fee with a capped number of revision rounds
- Common for pre-DA work
- Include, say, one concept revision and one compliance revision
- Anything beyond that is charged separately
-
Cost-plus for the uncertain part
- Best when the design is still moving
- Works when the client knows decisions are still open
- Needs proper time recording and transparent reporting
Renovate8’s own approach is blunt about this: fixed fees suit a project where you know exactly what you want from day one. Cost-plus suits a project where the finishes and details are still being decided. That is the same logic that should apply to a preliminary quote before DA.
If you want to avoid pricing yourself out of the job, do not load every possible redraw into the base figure. Instead, identify the likely triggers and price the first round of redesign, not the whole unknown future.
The hidden cost most people miss
The hidden cost is not materials. It is time.
Not just your time, either. It is the time spent waiting on:
- survey updates
- engineer input
- planning consultant comments
- client decisions on layout or finishes
- revised drawings after a DA condition
- coordination between architect, builder, and consultants
That delay has a cost because people still need to be paid while the project sits in limbo. If you are not careful, the preliminary quote becomes a bucket for unpaid coordination work.
That is why a good preliminary quote before DA should name the administrative load. Not as fluff. As scope.
If the client wants a fixed preliminary quote before DA, be honest about what you will not include:
- unlimited redesign
- full consultant coordination beyond the agreed package
- final documentation after approvals drawings are finalised
- design development that depends on selections not yet made
- conditions response work that only exists once council has assessed the DA
That is the line. Anything beyond it should be a separate fee or a clearly stated provisional allowance.
What I would refuse to include in a fixed pre-DA quote
If the client insists on a hard number before DA, I would refuse to lock in anything that depends on decisions not yet made.
That includes:
- exact joinery pricing before appliance and hardware selections
- final structural costs before engineering is complete
- full services coordination before the room layouts are settled
- external works before survey and drainage are resolved
- redraws for council or consultant changes beyond the agreed revision allowance
- documentation that will need to be remade if the approvals drawings are finalised differently
A fixed quote only works when the scope is fixed enough to support it. Otherwise you are just hiding the risk in the back end.
For projects like the Rozelle and Annandale jobs we have delivered, the successful ones were the ones where the early scope was honest. The cost plan was tied to what was actually known, not what everyone hoped would survive planning.
The practical way to structure a pre-DA quote
Use a simple structure. Nothing fancy.
1. Base pre-DA scope
List the work you are definitely doing now.
2. Assumptions
State what the quote assumes about the design, site access, consultant inputs, and council pathway.
3. Provisional allowances
Use these only for items that are real but not yet measurable.
4. Exclusions
Name the redraws, redesigns, and post-approval work that are not included.
5. Variation triggers
Say exactly what causes the price to change.
That structure gives the client something they can compare, and it protects you from eating the cost later when the approvals drawings are finalised.
If you want a practical benchmark, ask for a detailed quote with scope, materials, and boundaries set out in appendices rather than a lump sum. That format is much harder to game, and much easier to compare across builders and consultants.
The next move
Before you lodge the DA, put your current scope into five columns: included, excluded, provisional, assumptions, and variation triggers. Then read it as if you were trying to break it. If a redraw, consultant comment, or planning condition can blow a hole in the budget without showing up in one of those columns, the quote is not ready.
If you want that handled for you, Project management and cost control is the service to ask for. It gives you a detailed quote with scope, materials, and work-area appendices, plus fixed-price or cost-plus depending on how much is known at the start. Start there, before the DA goes in.