Introduction
Construction cost increases can change the financeability of a property development long before they make the project technically unprofitable.
A development loan is approved against a specific cost plan, valuation, equity contribution, construction program and profit margin. When building costs rise, each of those components can be affected. The total development cost increases, the required equity contribution may rise, the profit margin narrows and the lender’s cost-to-complete position can weaken.
Developers often focus on whether the project still shows a profit after a cost increase. Lenders ask a different question: is the project still fully funded, does the developer have enough liquidity to cover the increase and is there still sufficient value and margin to justify the proposed debt?
A relatively small construction increase can create a much larger funding problem if the project is already highly leveraged or operating with a thin contingency. The lender may reduce the facility, require additional equity, re-test the valuation, delay drawdowns or impose new conditions before construction can continue.
This guide explains how construction cost increases affect development finance, how lenders respond, why quantity surveyor reviews matter and what developers can do to protect both the project and the funding structure.
Why rising construction costs create a finance problem
Construction cost escalation affects more than the builder’s contract price.
When total development cost increases, the project’s loan-to-cost ratio rises unless the lender increases the debt. If the facility is already at the lender’s maximum LTC, the additional amount must generally be funded by the developer or another subordinated capital source.
The project profit also falls unless the expected sale value or completed investment value increases by an equivalent amount. This reduces the lender’s development margin buffer and can make the project more sensitive to lower values or delays.
Higher costs may also increase capitalised interest. If the developer contributes additional equity later than expected, more debt may remain outstanding for longer. A construction delay caused by redesign, procurement or variations can further increase interest, site overheads and professional fees.
The result is a compounding effect. A $500,000 building increase may lead to more than $500,000 of additional total cost once finance and delay expenses are included.
For lenders, the concern is not simply that the project has become more expensive. It is that the project may no longer have enough committed capital to reach completion.
“Cost increases eat equity before they eat profit.”
— The Australian Property Development Handbook
The difference between a cost increase and a funding shortfall
A cost increase is an economic change. A funding shortfall is a liquidity problem.
A project may remain profitable after construction costs rise, but the developer still needs to find the cash required to pay the difference. The projected profit is realised at the end of the project, while the cost increase must be funded during construction.
For example, a project may have an expected profit of $5 million. A $700,000 construction increase reduces the profit to $4.3 million, which may still be acceptable. However, if the lender will not increase the facility and the developer has no available cash, construction cannot continue.
This distinction is central to development finance. Lenders fund approved costs under the facility, but they do not rely on future project profit as a source of cash during construction.
A bankable response therefore needs both economic viability and immediate liquidity. The developer must show that the project still produces an acceptable margin and that the additional cost is fully funded when required.
How lenders use the cost-to-complete test
Cost to complete is one of the lender’s most important ongoing controls.
At each construction drawdown, the lender compares all remaining project costs with the undrawn facility and any remaining committed equity. The lender must be satisfied that there is enough money to complete the development and meet all project obligations.
If the remaining cost exceeds the available funding, a cost-to-complete shortfall exists. The lender will normally require the developer to contribute additional equity before further debt is released.
The cost-to-complete test includes more than unpaid builder claims. It can include consultant fees, authority charges, marketing, interest, GST timing, lender costs, contingency and other remaining expenses.
A project can therefore experience a shortfall even when the building contract itself remains within budget. Delayed settlements, higher interest, additional authority works or depleted contingency may all affect the calculation.
Developers should maintain their own updated cost-to-complete model rather than waiting for the lender or quantity surveyor to identify the problem.
The role of the lender’s quantity surveyor
The quantity surveyor is a key part of the lender’s risk management process.
Before finance approval, the lender’s QS reviews the construction budget, contract, plans, program, contingency and project costs. The QS assesses whether the proposed budget is sufficient to complete the development.
During construction, the QS reviews progress claims, variations, remaining costs and the adequacy of the facility. The lender generally relies on this report before approving each drawdown.
If costs increase, the QS will assess whether the variation is reasonable, whether it was included in the original scope and how it affects cost to complete.
Developers sometimes assume that an approved builder variation will automatically be funded by the lender. It may not be. The lender can accept that the variation is valid while still requiring the developer to fund it from equity.
The QS may also recommend an increased contingency where design remains incomplete or variations are continuing. This can increase the effective funding requirement even if the known variation amount is relatively small.
A strong relationship with the QS does not replace proper documentation. Variations should be clearly priced, explained and incorporated into the updated cost plan.
Fixed-price contracts do not remove all cost risk
A fixed-price building contract can reduce construction risk, but it does not eliminate it.
Many contracts contain exclusions, provisional sums, prime cost items, latent-condition provisions, escalation clauses and allowances that can change during construction.
Design changes requested by the developer are usually variations. Authority requirements that were not fully known at contract signing may also sit outside the fixed price.
A contractor may claim additional cost because of delays, access restrictions, unforeseen ground conditions or changes in law. Whether the claim is valid depends on the contract, but the project may still face timing and legal costs while the issue is resolved.
Builder insolvency is another risk. If the original contractor fails, the replacement cost can be materially higher even though the initial contract was fixed price.
Lenders and quantity surveyors therefore look beyond the contract label. They assess the completeness of design, the exclusions and the financial strength of the builder.
A fixed-price contract is most valuable when the scope is complete, the documentation is coordinated and the contractor has the capacity to perform.
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Common causes of construction cost increases
Construction costs can rise for many reasons, and the cause influences how the lender responds.
Material and labour escalation can affect projects where the construction price is not fully fixed or where procurement occurs over a long period.
Design development can reveal that the early cost plan was incomplete. Structural requirements, services coordination, fire engineering and façade details may become more expensive as documentation progresses.
Latent conditions can include poor ground, contamination, rock, groundwater, undocumented services or unsuitable fill.
Planning and authority conditions may require road upgrades, drainage, service connections, landscaping or infrastructure contributions that were not fully costed.
Builder variations can arise from developer changes, purchaser upgrades, tenant requirements or corrections to design errors.
Program delays can create additional preliminaries, supervision, crane hire, insurance, interest and professional fees.
A credible funding strategy identifies which risks remain and allocates an appropriate contingency rather than assuming all costs are controlled by the contract.
How contingency protects the funding structure
Contingency is not an optional line included only to satisfy the lender. It is the project’s first source of protection against unforeseen cost.
The appropriate contingency depends on the project type, design stage, contract structure, site conditions and developer experience.
A fully documented conventional townhouse project with a strong fixed-price contract may require less contingency than an apartment project with complex excavation and incomplete services design.
The lender may require the contingency to remain within the facility and may restrict its use. This means the developer cannot treat unused contingency as available profit or working capital.
Once contingency is consumed, the project has less protection against future issues. The lender may require it to be replenished or may insist that all further variations are funded from equity.
Developers should distinguish between construction contingency and broader development contingency. The project may also need allowances for interest overruns, sales delays, authority charges and professional fees.
A bankable feasibility contains enough contingency to reflect the actual remaining uncertainty, not the minimum percentage needed to make the profit look acceptable.
How cost increases affect loan-to-cost
Loan-to-cost compares debt with total development cost.
Assume a project has total development cost of $20 million and a senior facility of $14 million. The initial LTC is 70 per cent.
If construction costs increase by $1 million and the facility remains unchanged, the revised total cost is $21 million and the LTC falls to approximately 66.7 per cent. Although the ratio appears safer for the lender, the developer must fund the entire $1 million increase.
If the developer asks the lender to increase the facility to $14.7 million, the LTC returns to 70 per cent. However, the lender is not obliged to provide the increase and may be constrained by LVR, policy or the reduced project margin.
The developer may therefore face an equity requirement even though the project remains within the lender’s original LTC limit.
The practical lesson is that the maximum LTC is not a commitment to fund every cost increase. The approved facility amount and cost-to-complete position remain controlling.
How cost increases affect loan-to-value
Construction costs do not automatically increase the completed value.
If a project costs an additional $1 million but produces the same dwellings, floor area, rent or sale revenue, the lender’s valuation may remain unchanged.
This means the project can satisfy LTC but become constrained by LVR. The lender may be unwilling to increase debt because the completed value does not provide enough security.
In some cases, a variation improves the product and supports higher value. Upgraded finishes, additional lettable area or a stronger tenant specification may create value. However, the lender will require valuation evidence rather than assuming every added cost produces an equal value increase.
Cost escalation without value creation is particularly damaging because it reduces profit and increases the developer’s cash requirement at the same time.
Developers should therefore separate necessary cost increases from discretionary improvements and assess whether the market will pay for the change.
“Contingency is not padding; it is planning.”
— The Australian Property Development Handbook
How cost increases affect development profit
Every dollar of additional cost reduces project profit unless revenue also increases.
A project with a total development cost of $25 million and gross realisation value of $32 million has an initial profit of $7 million before tax.
If costs increase by $1.5 million and value remains unchanged, profit falls to $5.5 million. The profit on cost also declines because the denominator has increased.
The lender may have a minimum acceptable development margin. If the revised feasibility falls below that threshold, the project may no longer satisfy credit requirements.
Higher finance costs can further reduce the margin. If the cost increase causes a three-month delay, the project may incur additional interest, holding costs and selling expenses.
The lender will usually require an updated feasibility after a material cost change. It may also commission a revised valuation or ask the QS to verify the remaining budget.
A developer should not wait until the margin falls below lender requirements. Early reforecasting creates more options for scope changes, equity raising or facility restructuring.
Worked example: a construction cost increase
Assume a townhouse development has an original total development cost of $24 million and a gross realisation value of $31 million.
The senior lender provides a $16.8 million facility, equal to 70 per cent of cost. The developer contributes $7.2 million.
During construction, civil works and retaining costs increase by $900,000. A further two-month delay adds $250,000 of interest and holding costs. Total development cost rises to $25.15 million.
The completed value remains $31 million. Project profit falls from $7 million to $5.85 million.
The undrawn facility is insufficient to cover the revised cost to complete. The lender requires the developer to contribute an additional $1.15 million before approving the next drawdown.
The developer asks the lender to increase the loan. The lender is prepared to consider an additional $400,000, but only after reviewing the updated valuation and revised feasibility. The remaining $750,000 must come from sponsor equity.
This example shows why cost increases affect more than profit. The project remains viable, but the developer must solve an immediate liquidity requirement to keep construction moving.
What happens when the developer cannot fund the shortfall
A cost-to-complete shortfall can place the entire project at risk.
The lender may suspend drawdowns until the shortfall is cured. The builder may then slow or stop work because certified claims cannot be paid.
Delays can create further cost, including extension of time claims, site overheads, interest and purchaser settlement issues.
The developer may seek additional equity, mezzanine debt, preferred equity or a facility increase. Each option takes time and may require lender consent.
A distressed capital raise usually gives the developer less negotiating power. New investors may require a larger share of project profit or stronger control rights.
If the project cannot be restructured, the lender may exercise default rights. This is the outcome all parties generally seek to avoid because enforcement can reduce value and increase loss.
The best protection is early identification. A developer who informs the lender before the shortfall becomes critical has a better chance of negotiating a controlled solution.
Can the lender increase the facility?
A lender may increase the facility, but the decision is not automatic.
The lender will reassess LTC, LVR, profit margin, cost to complete, sponsor performance, presales or leasing and the project exit.
If the project still has a strong margin and substantial value buffer, the lender may approve an increase.
The lender may also require additional security, a fee, a revised interest rate or more sponsor equity.
Banks can be constrained by policy and formal credit approval. Private credit lenders may have more flexibility, but they will still price the additional risk and confirm that capital is available.
A facility increase can also affect the exit. More debt must be repaid from settlements or refinance, which may increase release prices or reduce cash distributions.
Developers should model the entire revised structure before accepting additional debt.
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Where senior debt cannot be increased, subordinated capital may fill the gap.
Mezzanine debt can provide additional funding behind the senior lender. It is usually more expensive and requires an intercreditor agreement.
Preferred equity may provide capital in return for a preferred return and priority distribution. It can reduce immediate debt pressure but may dilute the developer’s profit.
A joint-venture investor may contribute cash in exchange for ownership and control rights. This can be suitable for a large shortfall but may significantly change the project economics.
The senior lender must approve any additional capital. Undisclosed borrowing can breach the facility agreement and weaken the lender’s security position.
Emergency capital is rarely cheap. Developers should compare the cost of new funding with scope reduction, asset sales, sponsor contribution and other alternatives.
Value engineering and scope reduction
Value engineering can help control costs, but it must be undertaken carefully.
The objective is to reduce cost while preserving planning compliance, construction quality, marketability and valuation.
Changes may include simplifying finishes, standardising designs, revising landscaping, altering non-essential features or re-procuring certain packages.
The developer should consult the builder, architect, selling agent, valuer and lender before making material changes.
A cost saving that reduces sale value by more than the amount saved is not effective value engineering.
Changes can also trigger planning amendments, purchaser variation rights or delays. The full impact should be assessed before implementation.
The strongest value-engineering decisions remove unnecessary cost without weakening the product or exit strategy.
Managing purchaser upgrades and tenant changes
Purchaser upgrades and tenant variations can create hidden cost and timing risk.
A residential purchaser may request premium finishes, electrical changes or layout modifications. A commercial tenant may change fitout specifications or services.
These variations should be priced, approved and funded before work proceeds.
The lender may not finance upgrades even if the purchaser has agreed to pay more, particularly where the additional payment is not available until settlement.
The developer should maintain clear variation documentation and confirm whether the change affects the building contract, valuation, planning approval or program.
Uncontrolled customer changes can consume contingency and create coordination problems. A disciplined approval process protects both margin and delivery.
Builder distress and insolvency
Builder distress can create one of the largest construction cost increases.
If the contractor becomes insolvent, the project may face unpaid subcontractors, incomplete works, security disputes, defects and a higher replacement contract price.
The lender will review the builder’s financial capacity before approval, but financial conditions can change during construction.
Developers should monitor payment performance, subcontractor activity, site progress and requests for accelerated payments.
A replacement builder will generally price the remaining work with a risk premium. The new contractor may also refuse responsibility for existing defects or incomplete documentation.
The project should maintain sufficient security, insurance, records and contingency to respond to contractor failure.
Early warning and professional legal advice are critical if builder distress is suspected.
“A fixed-price contract is only as good as the builder behind it.”
— The Australian Property Development Handbook
How presales and settlement timing interact with cost increases
Cost increases can be more difficult to manage when presale prices are fixed.
A developer may be unable to increase revenue from contracts already exchanged, even though construction cost has risen.
Where presales have long settlement periods, purchaser finance or valuation risk may also increase during the delay.
The lender may increase release prices to ensure the higher debt is repaid. This can reduce the developer’s cash distribution from each settlement.
For unsold stock, the developer may attempt to increase pricing, but the market may not support the adjustment.
A project with a mix of presold and unsold product should model the revised debt coverage carefully.
Higher cost does not guarantee higher sale value, and contracted revenue may limit the developer’s ability to recover the increase.
How commercial projects are affected
Commercial developments face similar cost pressure, but the effect on value can differ.
A leased industrial, retail, childcare or service station project may be valued by capitalising rent. Construction cost increases do not necessarily increase rent.
If the tenant has agreed to a fixed rent under an agreement for lease, the developer may be unable to recover higher cost through income.
The completed investment value may therefore remain unchanged while profit falls.
Delays can also postpone rent commencement and sale or refinance. This increases interest and may trigger tenant rights under the agreement for lease.
The developer should ensure that tenant changes, fitout contributions and delay obligations are fully costed.
A strong operator or tenant does not protect the project from construction underfunding. The development still requires sufficient equity and cost-to-complete coverage.
How to prepare for cost escalation before finance approval
The best time to manage construction cost risk is before the facility is approved.
The developer should complete design development, obtain detailed trade pricing and reconcile the building contract with the feasibility.
Major exclusions and provisional sums should be identified and independently assessed.
The contingency should reflect the remaining design, procurement and site risk.
The construction program should include realistic lead times and allow for approval, weather and commissioning delays.
The developer should also maintain accessible liquidity outside the minimum equity contribution.
A downside feasibility should test construction escalation and delay. This shows whether the project remains viable and how much additional cash may be required.
Lenders respond positively when the sponsor demonstrates that cost risk has been quantified rather than ignored.
What to include in a cost-overrun management plan
A cost-overrun management plan should identify the current budget, committed costs, remaining packages, contingency and sponsor liquidity.
It should explain how variations are approved, who has authority to commit expenditure and how the lender and QS will be notified.
The plan should also identify potential funding sources, including unused contingency, sponsor cash, asset sales, external equity or subordinated debt.
Monthly reporting should compare actual cost, committed cost and forecast cost to complete.
Material changes should be reflected in the feasibility, program and exit model.
A formal process helps prevent small variations from accumulating into a large unrecognised shortfall.
These principles come from our free guide.
Download the handbook →Questions to ask before accepting a development facility
The developer should confirm how the lender defines total development cost and which costs are eligible for funding.
The term sheet should explain the required contingency and whether it can be used without lender approval.
The developer should understand when equity must be contributed and how cost overruns will be treated.
The facility agreement should state whether the lender can reduce drawdowns, require additional equity or re-test the valuation.
The developer should also review extension options, interest reserves, default pricing and any cost-to-complete covenant.
If the facility is highly leveraged, the sponsor should understand how little room remains before a variation creates a cash call.
The real question is not only how much debt is available. It is how the facility behaves when the cost plan changes.
Frequently asked questions
Will a lender automatically fund approved builder variations? No. The variation may be valid, but the lender may still require the developer to fund it from equity.
Can contingency be used for any cost increase? Usually not without review. The lender and QS may need to approve use of contingency.
Does a fixed-price contract prevent a cost overrun? No. Exclusions, provisional sums, latent conditions, variations and builder failure can still increase cost.
Can higher sale values offset construction increases? Potentially, but the lender will rely on independent valuation and contracted sales evidence.
What happens if the project margin falls below lender requirements? The lender may require more equity, lower debt, revised scope or another solution before continuing.
Can private credit solve a cost-to-complete shortfall? It can sometimes provide additional capital, but the funding is usually expensive and requires senior lender consent.
How much liquidity should a developer keep outside the project? There is no universal amount. The reserve should reflect project size, complexity, contingency and sponsor capacity.
When should the lender be told about a cost increase? As early as possible, particularly where the increase may affect cost to complete or the construction program.
Conclusion
Construction cost increases affect development finance through equity, liquidity, profit, leverage and timing.
A project can remain profitable but become unfinanceable if the additional cost is not funded when required.
The lender’s focus will be cost to complete, revised margin, valuation support and the developer’s ability to contribute more capital.
Developers can reduce risk through complete design, detailed pricing, appropriate contingency, strong builder selection, disciplined variation control and accessible liquidity.
When cost increases occur, early reforecasting and transparent lender communication create the best chance of a controlled solution.
Disclaimer
This article provides general information only and does not constitute financial, legal, tax, construction, investment, valuation or credit advice. Development finance terms and cost-overrun requirements vary between lenders and projects. Developers should obtain advice from appropriately qualified professionals before entering into any transaction.