Site classification
from $1,450- Two boreholes and field tests
- A site class to AS 2870
- Half a day on site
- Report in about ten working days
- Rock, fill or water can mean more boreholes and cost
BG·01 Geotechnical engineering · Brisbane
Know your ground before you build.
Site classifications, soil testing and foundation advice for homes, extensions and small commercial builds across South East Queensland.
- Site classification to AS 2870
- Lab results in ten working days
- Engineers by name
0 to 0.3 m
Topsoil
Organic and loose: always removed under footings.
- Site walkover
0.3 to 2.5 m
Clay
Shrinks when dry and swells when wet: the main driver of your site class.
- Borehole logging
- Shrink-swell testing
2.5 to 4 m
Weathered rock
Variable strength: we test it before trusting it.
- Penetrometer testing
4 m and below
Bedrock
Strong and stable, when you can reach it.
- Rock coring, if needed
BG·02 How it works
Four steps, no surprises.
From a quote to a signed report, with the results explained.
Quote
Your plans and address; we quote within two days.
Site visit
Boreholes and field tests, usually half a day.
Lab
Samples tested for shrink-swell and strength.
Report
A site class and foundation advice, signed.
10days
Lab turnaround.
About ten working days from the site visit to your report, and we'll tell you if a result needs a second look.
BG·03 Services
What's involved, and what can change.
Each service shows the work, the time and what could change the price.
Retaining wall advice
from $2,200- Soil strength and drainage assessment
- Design parameters for your engineer
- One day on site
- Steep or uneven sites may need extra testing
Footing inspection
from $380- A check of excavations before the pour
- A signed inspection note
- About an hour
- Same-day bookings depend on availability
BG·04 Our team
Who signs your report, by name.
Check registrations on the Board of Professional Engineers of Queensland register.
Ruth Okafor
Principal geotechnical engineerTwenty years on residential and civil sites.
RPEQ 00000 (placeholder)Dan Moreau
Geotechnical engineerRetaining walls and slope stability.
RPEQ 00000 (placeholder)Kira Lowe
Field technicianBoreholes, sampling and logging.
Field teamBG·05 Questions
Asked, answered plainly.
Why do I need this?
Your builder and certifier need a site class to design footings.
Can you test after rain?
Usually yes; we'll note conditions in the report.
What if you find rock?
We'll tell you on the day and quote any extra work before doing it.
BG·06 Quote
Know your ground, this month.
Send your plans and address for a quote within two days.