Window replacement in Sydney: where to start
Window replacement in Sydney can cut draughts, reduce traffic noise and help keep rooms cooler in summer and warmer in winter. The result depends on the whole installed window: the frame, glass, seals and how well it is fitted into the wall. Compare quotes on the same specification, not just the price per window.
Glass is only one component. Frame condition, opening size, ventilation and surrounding wall details matter. Confirm whether openings are retained or changed.
What’s usually included
Every property is different, but a good quote for window replacement should spell out items like these.
- Opening measure and existing-condition assessment
- Frame and glazing specification
- Installation and weather sealing
- Internal and external making good
- Removal and product documentation
How much does it cost?
Size, frame type, glazing, access and repairs around the opening affect cost. Ask whether flyscreens, painting and disposal are included.
How long it takes: Fitting new windows in a typical house often takes one to a few days, but custom-made windows can take several weeks to manufacture first.
Licences, insurance and approvals
In NSW, window replacement worth more than $5,000 (incl. GST) usually needs a contractor licence for glazing or general building. New windows should meet Australian Standards such as AS 2047 for windows and AS 1288 for glass.
Every member of our crew has their NSW licence verified and insurance sighted before joining, and agrees to quote in writing with their licence number shown. Before you sign, confirm the licence number on the quote using the NSW Government licence check, and make sure residential work over $5,000 (including GST) has a written contract.
Have these details ready
A clear brief gets you faster, more accurate quotes.
- Number and approximate sizes
- Performance priorities
- Existing frame material
- Opening changes and building access
Window replacement: common questions
Does double glazing describe the whole installed performance?
It describes a glazing arrangement. Ask about the complete system and installation details relevant to your comfort or noise goals.
Is double glazing worth it in Sydney?
Double glazing traps a layer of air or gas between two panes, which reduces heat transfer and outside noise. In Sydney's mild climate, people often choose it for noise, for comfort in west-facing rooms, or to save energy. Low-e single glazing can be a cheaper middle option. Ask for each product's U-value and SHGC to compare.
Can I replace just the glass instead of the whole window?
Sometimes. If the frame is in good condition, a glazier may be able to replace broken or single panes, or fit secondary glazing inside the existing window. If the frames are rotten, warped or leaking, full replacement usually makes more sense. Ask for an assessment of the frames before deciding.
Aluminium, uPVC or timber frames: which is best?
Aluminium frames are common, slim and low-maintenance, and thermally broken aluminium insulates better. uPVC frames insulate well and resist corrosion near the coast. Timber looks traditional and suits heritage homes but needs repainting. Choose a frame that suits your home's style, exposure to the weather and budget.
Do I need approval to replace windows?
Replacing windows like for like is often exempt from approval. Changing opening sizes, working on a heritage item or in a heritage conservation area, or living in a strata building can bring in approval requirements. Check with your council, a certifier or your strata manager before you order new windows.