Architectural Design Practique
Architectural Design Practique
PH: 02 8765 8081
M: 0419 253 653

Second Storey Additions Sydney

Second Storey Additions and Second Storey extensions are the same as a first-floor addition. A second storey addition involves the removal of the existing roof and the creation of another level. If you are thinking about building a second storey above the ground floor then you need a solid foundation to carry the additional loads.

At some stage an engineer is going to have to inspect the footings of the existing house to determine the suitability of the property.

When you build a second storey addition you are going to lose one of your existing rooms to accommodate the stairs. The number of stairs will be determined by the ground floor to first floor level. Typically, you will need at least 17 treads to the floor level above.

A second Storey addition needs to be well thought out. Typically, you will be spending anywhere from $300,000 upwards to add an extra 80 square metres on top. This number will vary according to the style of home. Obviously, a small terrace will have less floor area than a large bungalow. The two things that will slow up a second storey extension in Sydney faster than anything else is overshadowing and overlooking.

Most councils have strict guidelines with regard to overshadowing. You may need to step in from one or both sides to lower the impact of overshadowing.

Overlooking is another sensitive issue that needs to be considered when designing a second storey extension. Nothing will slow down your application quicker than letters to the planning department from irate neighbours. The placement of windows is important whenever you design a second storey extension.

A.D. Practique design second storey extensions in Sydney that work and add value to your property. If you want us to access your property fill in the form below.

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Email Address:
Full Name:
Phone No:

1) What is the address of your Property:
2) In what municipality is your property located
3) Who is the owner of the property?
4) What is the area in m2 of your property
5) Do you have a recent survey of your property
6) If no, are you prepared to get a contour survey of your property Cost $1,200.00 once the design process begins?
7) Do you have a copy of the sewerage diagram
8) If no, do you mind if we get a copy of the sewage layout from Reece plumbing or would you acquire it yourself?

Note: Building over or near the boards sewer can involve substantial additional costs either with encasing the pipe or piering down to the depth of the pipe. It is wise to establish the position of the pipe before any consultancy advice is given.

9) Are you interested in a granny flat/ studio or garage or combination?

10) Would you like a consultant to contact you?
11) Do you have any related questions that we have not considered?
General Comments:


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