Residential

Whether you are looking to build a new home, add a new extension or raise and build under; Design Sirs has an extensive history with all types of residential projects.

Design Sirs, is here to take your project from start to finish; our in depth knowledge allows us to simplify down to a practical, cost effective, engineered solution. Concise, well detail structural plans allow for faster build times and less complications on-site. We are here to support your project from start to finish.

House Raises

Raising your house is a great way to utilise your existing home & save cost on your renovation project. It alsoallows you to easily stage your works; so you spend less time out of home during construction.

As long as we’ve been engineering, Design Sirs has been raising houses. Our experience has allowed us to gather extensive knowledge on existing structures, common construction methods, and materials throughout Queensland. Our design focuses on re-using as much of the existing structure as economically possible and careful use of strengthening steel elements where required.

We can provide you with a set of construction plans and structural details for a typical house raise project starting at a rate of $2800-3600+GST. This includes;-

  • Design of concrete footings/ slab on ground-
  • Includes allowance for build over assets (stormwater, sewer, etc)-
  • Design of steel columns, beams & connections-
  • Design of timber floor framing, wall framing & roof framing
  • Design of all bracing, tie down & connections of the structure
  • A set of digital drawings in PDF format, including layout, sizing of elements and connection details
  • Structural Certification of your project for building approvalsContact us today for a project specific quote

We also recommend using Raise My House, for your house-raising project. We have worked extensively with them over many projects, allowing for familiarity in construction methods & communication.

NEW BUILDS

A new build will usually give the simplest construction method & most freedom when it comes to buildinglayout and materials used. Design Sirs is well versed in a large range of construction materials & methods.

Some common choices when building new houses is a raft slab vs a waffle slab; or timber framing vs steel framing.  We can answer any questions you may have about your project and help you decide what best suits your project.

We can provide you with a set of construction plans and structural details for a typical single storey housestartingat a rate of $2200-2800+GST and a two-storey house at a rate of 2800-3400+GST This includes;

  • Design of concrete footings/ slab on ground
  • Includes allowance for build over assets (stormwater, sewer, etc)
  • Design of steel columns, beams & connections (if any are required)
  • Design of timber floor framing, wall framing & roof framing
  • Design of all bracing, tie down & connections of the structure
  • A set of digital drawings in PDF format, including layout, sizing of elements and connection details
  • Structural Certification of your project for building approvals

We can also provide slab/ foundation design services only starting at a rate of $1100-1400+GST, this includes;

  • Design of concrete footings/ slab on ground
  • Includes allowance for build over assets (stormwater, sewer, etc)
  • A set of digital drawings in PDF format, including layout, sizing of elements and connection details
  • Structural Certification of your project for building approvals

Contact us today for a project specific quote.

Typically, before we can complete engineering, a Building Designer or Architect will do a layout plan for your project. 

For building design, we recommend Designer Planning

Renovation, Extension & Granny Flats

Thinking of adding some extra space or reconfiguring your existing space. Design Sirs can assist with the structural engineering requirements for your project.

We can assist with load bearing walls/ column removals, slab extensions, timber and steel floor/ roof frame extensions. Addition of lifts to a house, renovation of bathrooms to meet the NDIS specification. No project is too small.

We can provide you with a set of construction plans and structural details for a small extension/ renovation/granny flata rate of $1200-2400+GST. This includes;

  • Design of concrete footings/ slab on ground
  • Design of timber floor framing, wall framing & roof framing
  • Design of all bracing, tie down & connections of the structure
  • A set of digital drawings in PDF format, including layout, sizing of elements and connection details
  • Structural Certification of your project for building approvals

 

Depending on the extent of the works, you may also require building design drawings. Contact us today for more information and a project specific quote.

RESIDENTIAL RETAINING WALLS

Adding a retaining wall or repairing an existing one, is a great small project to take on around your home. In some cases you may not need engineering on your wall. However, you will need engineering on any retaining wall that is:

  • Over 1.0m in height
  • Located with 1.5m of another structure (including buried service pipes)

Design Sirs can help you understand what is involved in your retaining wall project and are experts in all types of retaining walls;

  • Concrete Sleeper retaining walls
  • Boulder/ Sandstone block retaining walls
  • Reinforced Concrete/ Masonry retaining walls


We can provide you with a set of construction plans and structural details for a retaining wall at rate of $1000+GST. This includes;-

  • Design of selected retaining wall
  • A set of digital drawings in PDF format, including layout, sizing of elements and connection details
  • Structural Certification of your project for building approvals
  • Inspection of the construction works
  • Structural Certification of the retaining wall for final sign off


Need a Landscaper? Contact one of our trusted Landscapers below and package up our design cost with their quote

Retaining Wall - Residential
residential retaining walls engineering

Pools, Decks and Carports

Adding a pool, deck or carport is a great way to add value and convenience to your home.

 

Design Sirs can assist with all your structural needs for small projects around the home.  We can provide you with a set of construction plans and structural details for a carport or deck at rate of $950-$1800+GST. This includes;

  • Design of concrete footings/slab on ground
  • Design of timber floor framing, wall framing & roof framing
  • Design of all bracing, tie down & connections of the structure
  • A set of digital drawings in PDF format, including layout, sizing of elements and connection details
  • Structural Certification of your project for building approvals.

We can provide you with a set of construction plans and structural details for a pool at rate of $1200- $1500+GST. This includes;

  • Design of concrete footings/ concrete pool shell
  • A set of digital drawings in PDF format, including layout, sizing of elements and connection details
  • Structural Certification of your project for building approvals