Home Extension Builders in Christchurch
Canterbury region · 19 builders listed
19 Home Extension Builders in Christchurch
Zen Builders Ltd
Zen Builders Ltd
5 reviews
RM Homes Canterbury Ltd.
RM Homes Canterbury Ltd.
5 reviews
Landmark Homes Christchurch & Canterbury
Landmark Homes Christchurch & Canterbury
5 reviews
Fleetwood Construction Limited
Fleetwood Construction Limited
5 reviews
Trent Builders
Trent Builders
5 reviews
Today Homes Limited
Today Homes Limited
5 reviews
Golden Homes Christchurch Offices & Showhome Shop
Golden Homes Christchurch Offices & Showhome Shop
5 reviews
Classic Builders Christchurch
Classic Builders Christchurch
5 reviews
Canterbury Builders Limited
Canterbury Builders Limited
2 reviews
Sentinel Homes Christchurch - House & Land Builder, Designer and Subdivider
Sentinel Homes Christchurch - House & Land Builder, Designer and Subdivider
5 reviews
Golden Homes Christchurch Showhome
Golden Homes Christchurch Showhome
1 reviews
Brewer Builders Ltd
Brewer Builders Ltd
5 reviews
Fenwick Builders Ltd
Fenwick Builders Ltd
5 reviews
Wrightway Construction
Wrightway Construction
5 reviews
McBride Construction Ltd
McBride Construction Ltd
5 reviews
Summit Construction
Summit Construction
5 reviews
Signature Homes Christchurch South
Signature Homes Christchurch South
5 reviews
Leighs Construction
Leighs Construction
5 reviews
Rise Residential Limited - Residential Builders Christchurch
Rise Residential Limited - Residential Builders Christchurch
5 reviews
Planning a home extension in Christchurch? Extending your existing home is often more cost-effective than selling and buying a larger property. Our listed home extension builders in Christchurch are Licensed Building Practitioners experienced with single and multi-storey additions across the Canterbury region.
Home Extension Costs in {city}
Home extensions in New Zealand typically cost $2,500 to $4,000 per square metre, depending on the complexity and specification. A single-storey rear extension of 30 square metres costs approximately $75,000 to $120,000. A second-storey addition is more expensive at $3,500 to $5,000 per square metre due to structural reinforcement requirements. These prices include labour, materials, and GST but exclude consent fees (typically $2,000 to $5,000) and professional design fees.
Building Consent for Extensions
Almost all home extensions in New Zealand require a building consent under the Building Act 2004. Extensions involve structural work, changes to the building envelope, and usually plumbing and electrical work. You will also need to check your district plan for site coverage limits, height-to-boundary rules, and setback requirements. If your extension does not comply with the district plan, you may need a resource consent as well. Allow 20 working days for building consent processing and potentially longer for resource consent.
Types of Home Extensions
Common home extensions in New Zealand include rear extensions (extending the back of the house into the yard), side extensions (building out to the side boundary, subject to setback rules), second-storey additions (adding a full or partial upper level), and sleep-outs or granny flats (standalone or attached secondary dwellings). Each type has different structural, consent, and cost implications. A good extension builder will help you choose the best option for your section and budget.
Choosing an Extension Builder in {city}
Home extensions require a builder experienced with integrating new construction into existing structures. This is more complex than new builds because the builder must match rooflines, floor levels, cladding, and interior finishes. Check that your builder is a Licensed Building Practitioner (LBP), has specific extension experience (ask for examples), provides a fixed-price contract, and holds public liability and contract works insurance. For residential building work over $30,000, a written contract is required by law.
Home Extension Builders in Christchurch — FAQ
Home extensions in Christchurch typically cost $2,500 to $4,000 per square metre for single-storey additions. A 30-square-metre extension costs approximately $75,000 to $120,000. Second-storey additions cost $3,500 to $5,000 per square metre due to structural requirements. Get multiple quotes from extension builders to compare.
Home Extension Builders Across Christchurch
Our home extension builders cover all areas of Christchurch including Riccarton, Merivale, Fendalton, Papanui, St Albans, Addington, Sydenham, Cashmere, Sumner, Lyttelton, and surrounding suburbs. No matter where you are in Christchurch, we can connect you with a trusted local home extension builder.