What Every Homeowner Should Know

Things to Be Mindful Of When Reviewing a Building Quote

When you’re starting a building project, it’s natural to wonder, “How much will this really cost?” Knowing the likely expenses upfront helps you plan your finances, organise approvals, and get ready for construction with confidence.

Most builders provide an estimate free of charge. Clients commonly use estimates to support loan applications or seek preliminary building approval.

But before you get started, it’s essential to know the difference between an estimate and a quote, these two terms can have a big impact on your project and your budget.

What Is An Estimate?

An estimate offers a ballpark figure, a contractor’s best guess based on their industry expertise and experience with similar projects.

Since estimates are just an early guide, they aren’t fixed or legally binding. Builders usually put them together before your final selections, engineering plans, or detailed specs are ready.

That’s why you’ll sometimes hear estimates called “guestimates”; the actual cost can go up or down as your project takes shape.

What Is A Quote?

A quote, on the other hand, is much more detailed and precise.

Once you accept a quote, your builder agrees to complete everything listed in the specifications for that specific price. Unlike an estimate, a fixed-price quote gives both you and your builder much more certainty about the final cost.

However, costs can still change if:

• You request additional work.
• You alter the scope of work.
• Unforeseen site conditions arise.
• Selections exceed allowances.

These changes are called variations.

If you know in advance where variations might pop up, you can budget more accurately and avoid unwanted surprises down the track.

How To Obtain An Accurate Estimate?

Clients generally obtain estimates through either:

• a building contractor
• a quantity surveyor

Quantity surveyors specialise in construction costing. They often work alongside architects, engineers, and builders to prepare detailed cost estimates for a project.

Many homeowners choose to obtain a quantity surveyor estimate before sending the project out to tender with builders. This creates a useful benchmark when reviewing returned quotes.

If one quote appears significantly cheaper or more expensive than the others, it’s important to investigate why.

Understanding Prime Cost (PC) Items

Prime Cost (PC) items are allowances for products that have not yet been selected during the quoting stage.

Common Prime Cost items include:

• carpet
• tiles
• tapware
• appliances
• lighting
• bathroom fixtures

For example, a builder may allow $80/m² for tiles during quoting. However, if you later select tiles worth $140/m², the difference becomes a variation to the contract.

Labour costs for installation usually remain fixed, while the final supply cost changes depending on your selections.

Because of this, it’s important to review whether PC allowances realistically reflect the finishes you expect.

Understanding Provisional Sums (PS)

Provisional Sums differ from Prime Cost items because they include allowances for both labour and materials where the exact scope of works is still uncertain.

Builders commonly use Provisional Sums for:

• excavation
• landscaping
• retaining walls
• drainage works
• rock removal
• custom features

For example, a client may want a stone fireplace but has not yet selected the exact stone finish. In this situation, the builder includes an estimated allowance for both materials and installation.

Once selections become final, the builder adjusts the contract through a variation.

Provisional Sums can significantly impact budgets if underestimated, so ask your builder whether the allowance realistically covers the quality you expect.

Why Detailed Documentation Matters

The more information you provide during quoting, the more accurate your pricing will be.

Detailed documentation should include:

• architectural drawings
• elevations
• engineering
• specifications
• materials
• finishes
• site surveys

Without sufficient detail, builders must rely heavily on allowances and assumptions, which increases pricing uncertainty.

Information Your Builder May Request

To prepare a detailed quote, builders often ask for selections and specifications, including:

Floor Finishes

• carpet
• tiles
• timber flooring

Interior Linings

• plaster
• timber cladding
• V-groove lining boards

Paint Finishes

• colours
• textures
• sheen levels

Joinery & Cabinetry

• cabinetry drawings
• benchtops
• finishes

Doors & Windows

• window schedules
• glazing specifications
• door types

Plumbing Fixtures

• tapware
• toilets
• hot water systems
• tanks

Electrical Selections

• appliances
• lighting
• fans
• switches

Exterior Finishes

• cladding materials
• decking timber
• hardware

Mechanical Services

• heating
• cooling
• garage doors

Why The Cheapest Quote Isn’t Always Best

Comparing quotes is a smart way to choose the right builder, but don’t let price be your only deciding factor.

A significantly cheaper quote may indicate:

• lower-quality materials
• unrealistic allowances
• missing scope items
• inexperience with similar projects

Instead, review:

• experience
• communication
• craftsmanship
• transparency
• completed projects
• client reviews

For instance, if you’re dreaming of a handcrafted timber home, you’ll want a builder who specialises in timber, not someone who mostly works with concrete.

Should You Pay For A Quote?

It’s becoming increasingly common for builders to charge for detailed quotes.

Preparing an accurate fixed-price quote requires substantial time reviewing:

• drawings
• engineering
• specifications
• site conditions
• supplier pricing

Because of this, some builders charge quoting fees to ensure sufficient time and detail go into the process.

A paid quote often provides greater accuracy and transparency than a rushed or incomplete free quote.

What Your Quote Should Include

Your quote should clearly outline:

• the scope of works
• materials and fittings
• labour costs
• subcontractor pricing
• allowances
• exclusions
• estimated construction timeframe

Ask your builder to present the quote in organised categories so you can clearly understand where costs originate.

Reviewing Contracts Carefully

Before signing, read your contract thoroughly and allow yourself enough time to fully understand it.

Pay particular attention to:

• payment schedules
• variations
• allowances
• exclusions
• construction timelines

If you feel unsure about any aspect of the contract, seek advice from a contracts lawyer before proceeding. In Victoria, the Consumer Affairs Victoria website provides valuable information regarding domestic building contracts and consumer protections.

Managing Variations During Construction

Once construction begins, any additional costs outside the agreed scope should be documented as formal variations.

Good builders communicate variations clearly before commencing additional work.

Importantly:

• Verbal approvals are not enough.
• Variations should be documented in writing.
• Signed variation forms provide clarity for both parties.

This process protects both the homeowner and builder throughout the project.

Final LRC Custom Builders Thoughts

Knowing the difference between an estimate and a quote empowers you to make smarter decisions before your build even begins.

A clear, detailed quote gives you confidence, makes communication easier, and helps you stick to your budget, whether you’re building new or renovating.

Most importantly, take the time to review quotes carefully, ask questions, and choose a builder whose experience, communication, and workmanship align with your project goals.