Retaining Wall Design
Engineering design and documentation for safe, stable retaining walls suited to your site, ground conditions and proposed level changes.
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NICOLAIE BOICA, CPEng • STRUCTURAL & CIVIL ENGINEER • NEWINGTON, SYDNEY
Retaining walls —
designed right,
documented properly.
Engineering design, assessment and certification for new walls, wall replacement, and existing walls showing signs of movement or failure — practically delivered, properly documented.
20+ yrs experience
CPEng · NER · RPEQ · VBA
Licensed NSW · VIC · QLD · ACT
Fast Turnaround
Clear advice, practical solutions and realistic timeframes to help keep your construction or approval process moving.
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New Walls, Repairs & Certification
Engineering support for new retaining walls, wall replacement, structural repairs, condition assessments and certification.
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REGISTERED WITH
ENGINEERS AUSTRALIA
ENGINEERS AUSTRALIA
COUNCIL DA & CC
READY
READY
DESIGNED TO
AUSTRALIAN STANDARDS
AUSTRALIAN STANDARDS
DEAL DIRECTLY
WITH THE ENGINEER
WITH THE ENGINEER
01 — EXPLORE
Retaining wall engineering, clearly explained.
Services
Explore retaining-wall design, assessments, documentation, certification and the wall systems we can engineer.
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About
Learn how projects are personally overseen, certified and supported across Sydney, NSW and the ACT.
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Calculator
Open the preliminary retaining-wall calculator for early planning and initial dimensional checks.
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02 — ONLINE TOOL
Retaining Wall Calculator
Use our preliminary retaining-wall calculator to explore basic wall dimensions, retained heights and initial design information. This is an early planning tool only; final design must be based on actual site conditions, soil information, drainage arrangements and applied loads.
Open Retaining Wall Calculator →03 — EXISTING WALLS
Is your retaining wall moving or failing?
Retaining walls rarely fail without warning. Leaning, cracking, bulging, blocked drainage or lost backfill are all signs that the stability margin may be reducing — and the cause matters more than the symptom. Early engineering assessment can interrupt the chain before a maintenance issue becomes a costly or dangerous failure.
Common warning signs
- Leaning or rotation
- Horizontal or stepped cracking
- Bulging between supports
- Settlement or sinking
- Separation at joints
Drainage and deterioration
- Blocked or missing drainage
- Erosion or soil loss
- Rusting steel posts
- Displaced sleepers or blocks
- Movement of nearby paving, fences or structures
ENGINEERING GUIDE
Read the guide →
Read our full Retaining Wall Failure Modes guide — how walls are classified under AS 4678, the three minimum stability checks, common defects and the escalation path from blocked drainage to collapse.
04 — FULL ENGINEERING PRACTICE
More than a retaining wall?
Sydney Retaining Walls is the retaining-wall arm of BOICA NIB Consulting Engineers. The same registered engineer also handles new builds, alterations, footings and slabs, load-bearing wall removal, structural inspections, crack and foundation reports, plus stormwater and civil design — all certified and council-ready.
05 — SERVICE AREA
Retaining wall engineering across Sydney
Based in Newington, we provide retaining wall design, assessment and certification across Sydney's Inner West, Northern Sydney, Western Sydney and the broader metro area. Suitable projects are also taken on the Central Coast, regional NSW and the ACT.
Inner West
Newington, Homebush, Strathfield, Burwood, Concord, Five Dock, Drummoyne, Ashfield, Leichhardt, Balmain, Rhodes, Lidcombe.
Northern Sydney
Ryde, West Ryde, Meadowbank, Gladesville, Hunters Hill, Eastwood, Epping, Chatswood.
Western Sydney
Parramatta, Granville, Merrylands, Auburn, Sydney Olympic Park, Silverwater.
Beyond Metro Sydney
Central Coast, Wollongong & Illawarra, Blue Mountains, regional NSW, ACT & Canberra.
Not listed? We service every Sydney council area for retaining wall engineering — get in touch with your project address.
06 — ENQUIRY
Need advice about a retaining wall?
Send us photographs, approximate dimensions, the site address and any available plans or soil information. We can advise whether you need an inspection, structural design, repair recommendations or certification.