CPEng · NER · RPEV PE0004512

Structural design and certification, priced before we start

Kestrel works with owner-builders, architects and small commercial developers across greater Melbourne. Fixed fees, drawings in ten working days.

See the fee bands

What we are engaged for

Every engagement is signed off by a Registered Professional Engineer of Victoria.

Residential extension design

from A$2,400

Beams, lintels, footings and connections for a single or double-storey addition, with computations.

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Removal of a load-bearing wall

from A$980

Site measure, temporary propping scheme and a certified beam design for your building surveyor.

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Pre-purchase structural inspection

A$1,150

Two-hour walkover, defect photography and a written opinion on movement, moisture and framing.

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Retaining wall design

from A$1,800

Geotechnical review, wall design to AS 4678 and council-ready documentation.

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Steel frame and portal shed design

from A$4,200

Light commercial portal frames, wind loading to AS/NZS 1170, fabrication drawings.

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Expert witness and dispute reports

A$420/hr

Independent structural opinion for VCAT and insurer matters, prepared to the expert code of conduct.

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How we package fees

Pick the band that fits the job; anything unusual gets a bespoke proposal within two days.

Single element

A$980fixed

  • One beam, lintel or footing
  • Site measure included
  • Certified computations
  • Ten working day turnaround
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Retained

A$1,600per month

  • For builders with steady volume
  • Priority ten-day queue
  • Unlimited short-form advice
  • Quarterly detailing review
  • Discounted site attendances
Talk to us

Brunswick — 1920s weatherboard, rear opening of 6.4m

The owners wanted the back wall gone without a post in the middle of the kitchen. We used a 460UB steel with a concealed flitch to keep the ceiling line flat, and designed a temporary propping sequence the builder could put up in a single morning. Council approved without an RFI.

Steel beam installed in a rear extension

Geelong — 640m² portal frame workshop

A fabricator outgrew their shed and needed 8m clear internal height with a 5-tonne gantry. We designed the portals, crane runway beams and slab thickenings, and worked the wind bracing around three roller doors on the exposed western elevation. Erected in nine days.

Steel portal frame workshop under construction

Fitzroy North — underpinning after slab heave

Reactive clay and a leaking stormwater line had lifted the rear of a slab by 34mm. We instrumented the floor for six weeks before designing anything, then specified screw piles only where the movement was live. Half the underpinning the original report called for.

Level survey markers on a cracked concrete slab

How an engagement runs

No surprises, and no invoice you have not already seen the number for.

  1. Send us what you have

    Sketches, a survey, an architect’s set or three photos on your phone — all fine. We will tell you what is missing.

  2. Fixed fee proposal in 48 hours

    Scope, exclusions, deliverables and a date. If we cannot fix the fee we say why and quote a capped rate.

  3. Site measure

    We attend, measure, and open up enough to be sure what is holding the building up before we draw anything.

  4. Design and certification

    Drawings, computations and the RPEV certificate, issued as a single signed PDF set.

  5. Through to approval

    We answer the building surveyor’s questions directly. RFI responses are included, not extra.

Registrations and insurance

RPEV registered

Registered Professional Engineer of Victoria, structural area of engineering, PE0004512.

CPEng and NER

Chartered status with Engineers Australia and listed on the National Engineering Register.

A$10m PI cover

Professional indemnity to A$10m and public liability to A$20m, with certificates of currency issued alongside every proposal.

Request a fee proposal

Two days for a written fee, most of the time same day. Attachments can follow by email.

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