How Long Should a Construction Estimate Take?

The Honest Answer on Turnaround Times

When a Perth builder or concreter asks how long an estimate takes, the honest answer is that it depends on what is in the plans and how complete they are. A clean set of residential drawings with a clear specification is a much faster job than a partially detailed commercial package with missing structural drawings.

What Does a Fast Turnaround Actually Mean?

24-hour turnaround on a residential estimate means the complete priced spreadsheet and colour-coded plan markup are delivered within one business day of receiving a complete set of plans. It does not mean we start with what we have and fill in the gaps later. If the plans are incomplete, we flag that at the start rather than produce a partial estimate and revise it.

Here is the promise. We will not let you down. We are fast and we are responsive, and if there is a deadline to hit we will hit it, unless it is completely unreasonable and last minute. If you send us three jobs at once, we ask which one is the priority and get that back to you first, then knock over the smaller ones and save the biggest for last.

Residential Estimates - What 24 Hours Covers

A standard residential concrete estimate - house slab, driveway, alfresco area, garage floor - can be completed within 24 hours of receiving the plans on most jobs. This assumes the architectural and structural drawings are both complete, the specification is clear, and there are no significant missing elements that require a query back to the designer.

Residential multi-trade estimates - where we are pricing concrete alongside earthworks, framing, roofing and fitting out - take longer. The more trades in scope, the more drawings to read and the more rate categories to apply. For a full residential estimate across all trades, allow 2 to 3 days.

• House slab only (architectural + structural plans): 24 hours
• Slab plus earthworks and retaining: 24 to 48 hours
• Full residential estimate across all trades: 2 to 3 days
• Multi-unit residential with repeated floor plates: 2 to 3 days
• Unit development with civil, hydraulic and electrical: 3 to 5 days

Commercial Estimates - Realistic Timeframes

Commercial construction estimates require more time because there are more drawings to read, more trades to price and often more complex structural elements. A tilt-panel warehouse, a multi-storey commercial building or a retail fit-out all have structural, civil, hydraulic, electrical and mechanical elements that each need separate measurement.

Commercial tender packages often have fixed deadline dates. If you have a tender closing date, let us know when you send the plans. We will confirm whether the turnaround is achievable or whether a priority arrangement needs to be discussed upfront.

What Slows an Estimate Down

In most cases, the estimator is not the constraint. The bottleneck is incomplete or inconsistent information in the plan package. After 18 years of estimating Perth construction work, the issues that cause delays are consistent.

1. 01

   Incomplete Plans

   Missing sections, unannotated structural details or plans that reference a separate specification that was not included in the package. We flag these immediately rather than assume.

2. 02

   Scale Discrepancies

   Plans printed at the wrong size require a query back to the designer before measurement can start. A plan drawn at 1:100 but printed to fit A3 changes every dimension.

3. 03

   Missing Geotechnical Report

   On concrete slab estimates, the geotechnical report determines the slab design and the reinforcement schedule. Without it, structural requirements cannot be confirmed.

4. 04

   Late Revisions

   When revised drawings arrive after the estimate is underway, the affected sections need to be remeasured. If the revision is significant, the estimate restarts on those elements.

5. 05

   Scope Creep During Pricing

   When additional items are added to the scope during the estimating process, the clock extends. Agree the scope at the start and flag additions as they arise rather than absorbing them silently.

The Fastest Way to Get a Quick Estimate

Send the complete plan package - architectural, structural, geotechnical report, and specification - in one email. Confirm the tender closing date in the same message. We can confirm the turnaround same day and start work immediately. Sending a partial set and following up with missing documents later will always take longer than a complete package at the start.

Our Estimating Process Step by Step

Every estimate follows the same sequence. Knowing what happens after you send the plans helps you plan around the expected delivery date.

1. 01

   Plans Received and Reviewed

   We open the package, check what has been sent and confirm receipt the same day. If anything is missing, you hear about it within hours - not after we have started.

2. 02

   Scope and Turnaround Confirmed

   We confirm what is in scope, any assumptions we will apply, and the expected delivery date. The fixed fee is agreed at this stage.

3. 03

   Scale Calibration

   Every plan is checked against the title block dimensions. If the scale does not calibrate correctly, we raise it before measuring a single item.

4. 04

   Takeoff and Colour-Code Markup

   Quantities are measured directly from the plans. Each element is colour-coded on the markup so you can see exactly what has been counted and where.

5. 05

   Rate Application

   Quantities are applied to current Perth supply and labour rates. No east-coast rate cards, no outdated databases.

6. 06

   Estimate Delivered

   You receive the priced spreadsheet and the colour-coded PDF markup. If there are questions on any line item, we answer them as part of the service.

A fast estimate is only useful if it is accurate. The 24-hour turnaround on residential jobs is the result of a tight, repeatable process - not a quick skim of the plans.

What to Do if You Have a Tight Deadline

If a tender is closing in less than 24 hours, let us know immediately when you send the plans. On some jobs we can prioritise the work. On others, the scope may be too large for the available time and we will tell you that straight rather than rush an inaccurate estimate.

A rushed estimate that misses items costs more than a missed tender. If the timing does not work for a proper estimate, the honest answer is to let that tender pass or to submit with a provisional sum and flag it clearly.

Rushing an Estimate Is Not Free

An estimate produced in two hours on a job that needs eight is going to miss something. The missed items show up as variations once the job is underway. In most cases the cost of the variation is significantly higher than the cost of either waiting for a proper estimate or passing on the tender. Do not pressure your estimator into a turnaround that the scope cannot support.

Frequently Asked Questions