Architectural design specialists - Home extension plans

House Renovation and Extension Plans Specialist - Contact us Ph:- 0406 807 833

House extension and renovation plan ideas

Home renovation and extension plans
Gold Coast - Brisbane - Northern NSW.

Choosing to renovate and extend your home is often a choice between staying in a location that suits you and your lifestyle, moving or building a new home. Your existing home may have special character or have a sentimental place in your heart.

To make the most of your investment, we discuss your renovation, alteration and/or extension requirements listening to your needs and ideas, after all, its your home and you have had time to reflect on how you live. We can of course offer suggestions based on experience of what has worked well for others carrying out similar projects.

To effectively plan your home renovation or extension, experience and flair needs to be applied with detailed construction knowledge and fresh design ideas. SKETCH3D Residential Design is a building design specialist, knowing how to approach each individual home, considering your requirements to get the most of out your proposed alterations, extension or whole house renovation. With every design commision we visit your home, this allows us to get a full understanding of the space, construction and setting. We strive to meet your ideal design outcome.

After the initial design we will submit the house extension design to a certifier for review and approvals. We will act as your agent, so for the most part all you need to worry about is paying the fees and waiting for the descisions. We work to ensure that the designs that go in for the required applications have had the construction thought out and can be built generally without fundamental modification to the design.

The design process takes into account many aspects based on the client brief.

  • Size and appearance of the extension against the existing house.
  • Internal functionality of the proposal to best ensure the design flows and can be furnished allowing you the client to get the most enjoyment out of your investment.
  • Sun shadow fall resulting from the extension and its impact on surrounding properties where relevant.
  • As standard for most projects we offer BIMx interactive 3D walkthroughs and static 3D images.

At the end of the design process we can aid you with the selection of a suitable builder for your extension or renovation project.

Other building works you may consider include garage conversions to utilise the space you already have and an energy efficiency make over.

We are proud of the quality of service we provide.
See example house renovation and extension plans.

_ Typical styles of house extension plans and granny annex designs _

Single Storey rear extension plans 

Single storey house extensions
Most house extensions tend to be single storey designs, projecting from the rear of the existing house. These type of extensions are used to form additional living rooms and often combined with kitchens creating open plan kitchen, dining , living room extensions.
Other more simple single storey extension designs are side extensions, often designed to form utility rooms, ground floor toilet facilities, garages and sometimes to knock through into the existing house to enlarge an existing room.
Single storey extension plans do sometimes project to the front of the house, these often forming entrance halls, toilet facilities or to enlarge existing front rooms.
Front, side and rear extension plans are often combined to form wrap around extensions. With clever engineering it is possible to remove whole corners of the existing homes to open the house out into the extensions creating vast open plan living spaces.
In many cases side and rear extensions can be built without planning approval using permitted development rights. Front extensions with the exception of some porch designs
will most likely require planning approval.



Double storey front and side house extension plans Two storey house extensions
Plans for two storey house extensions are popular when a client requires an extra bedroom or to simply better proportion the sizes of the existing bedrooms within their house. Often the ground floor part of the extension is used to contain a ground floor WC, a bigger kitchen and sometimes an improved living room.
Double storey extensions can be combined with single storey extensions to gain the best possible use of space without the expense of a full double storey extension.

To support the first floor an amount of structural engineering is required, this however when properly considered should not be a reason to put the build out of budget.





Granny annex two storey house extension plan 

Annex designs
Commonly known as a 'Granny Annex' these type of house extensions are ideally suited to accomadating extended family or giving independance to a family member who might be struggling phyically for financially while keeping them within the home evironment.
Sometimes after the immediate need for the annex has passed, the additional room is let out to help the home owner meet mortgage payments or just provide an extra income.
An annex while prodominently self contained must share facilities so as to remain as part of the dwelling. Independant separate front doors and garden access are generally acceptable as are separate stairs for two storey designs.






When considering the design of a house extension there are several things which need to be considered

1. Are you creating any additional bedrooms? If so will there be enough parking spaces to meet with the local authority parking standards or are other services up to the required specification.

2. Has the design identified foul drainage? Access to the existing sewage system is important for connecting new bathrooms, en-suites, kitchens and utility rooms. Although there are mechanical methods to deal with foul waste, gravity systems are the best solution when it comes to low noise and maintenance.

3. Will the design affect the underground services such as electric, gas and phone? Relocating these services while generally possible can be expensive and so, unless you really need to move them to achieve the design you want, they are best left alone.

4. Trees will affect the construction of the extension and in some cases trees are protected, requiring permission to remove them or carry out any significant pruning. Root protection zones and method statements are generally required at planning stage to document how the trees will be protected during construction. The effects of tree roots can affect how deep footings are cast subject to the building inspectors approval.

5. Access is an often over looked part of the design. Building right to the boundary might be your only solution to achieving the space you want, however if this blocks the access, say from the front of the property to the rear and there is no other access routes, consideration should be given to how you would move items such as gardening equipment, bins etc from the rear of the house to the street. It might be that the only route is straight through the house meaning you will need to be prepared for the