Home alterations

If you are wanting to undertake alterations or have concerns about the weather tightness of your home you can book a FREE consultation with our Director of Construction (Gavin Morrow).  Gavin who has over 25 years of experience, will personally visit your home to explain the step by step process to add value to your home.   


You can have peace of mind that experts are adding value to your home, all covered by the Registered Master Builder 10- year guarantee.

Our rigorous quality control procedures that we have in place to ensure that we provide you with a uniquely beautiful home.

Our Services

Recladding & weather tightness
Recladding & weather tightness
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Exterior Extensions
Exterior Extensions
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Our Process


Book your complimentary home consultation to assess your home


Thorne Group Architectural designer (or you can select your own) will translate your requirements to drawings.


Once council consent drawings have been completed, we will then provide you with a comprehensive cost estimate.

Council Consent

We can manage the process from council consent through to code of compliance.

Book a FREE site visit

Email:  Gavin@thornegroup.co.nz

Mobile:  021 718474

Professional Services

Depending on the complexity of your alteration or renovation, you may require professional services.   


Architectural Services

Multi-award winning architectural designer Jon McAlpine has extensive experience with major renovations and alterations.  

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Interior Designer

Jacqui from Twill Design trained in London at the prestigious Chelsea College of Art and Design in London.  This takes all the stress out of decision making.

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Quantity Surveyor 

Our in house quantity surveyor will provide you with a comprehensive breakdown of every aspect of your home alteration or renovation

You can use Thorne Group Architecture or select your own architect

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Asbestos removal

Homes built prior to 1985 are likely to have asbestos.  We can arrange testing and safe removal of asbestos from the building.  

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Niche Design Co

Chelsey Mathieson is a qualified independent designer specialising in Kitchen and Spatial design. Detailing design and storage uniquely to suit each individual project.

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Engineers and Surveyors

When undertaking major alterations or renovations you may require the services of a structural engineer and /or surveyor.

Case studies

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Before and After

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Before and After

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