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Extensor is an established real estate advisory company with extensive experience across New Zealand and internationally in all classes of property.

We provide litigation support and transaction advisory, delivered with personal service by experienced professionals, each with vast experience in individual specialist fields.

Established in 2002, Extensor delivers innovative solutions to complex occupation and ownership issues through to expert valuation assistance across a range of transaction structures.

Our Services

Litigation Support - Real Estate

We provide expert valuation evidence, full arbitration and mediation services, valuation and rental disputes and specialist asset pricing.

Advisory - Negotiation

We assist with negotiating sale/purchase and leases, ownership and transaction structures and benchmarking, links with tax and accounting advice, and more.

Advisory - Valuations

We advise on commercial and industrial property, rental assessments and negotiation, provide non-market valuations and statutory assessments.


  • Expert valuation evidence from commercial matters to statutory compensation
  • Full arbitration and mediation services
  • Valuation and rental disputes
  • Specialist asset pricing


  • Transaction management - negotiating sale/purchase and leases
  • Ownership and transaction structures and benchmarking
  • Linkage with tax and accounting advice
  • Practical real estate assistance across all fields


  • All commercial and industrial property
  • Specialist property valuation
  • Rental assessment and negotiation including full representation service
  • Non-market valuation
  • Statutory assessments

Extensor has an enviable and extensive client base across all significant forms of real estate

We have an unrivalled track record to back up our promise to deliver results; the best client outcomes from innovative ideas, experience and knowledge.

Working globally, we have undertaken varied assignments for:

  • Individuals and individual portfolio holders
  • Bodies corporate
  • Major corporates
  • Central government
  • Local government
  • Maori trusts
  • Property companies and listed property trusts
  • Primary and essential industries
  • Infrastructure-owning entities

Our Experience

Extensor delivers premium advice for litigation support and negotiation for real estate matters.

Sectors we specialise in include:

  • Commercial real estate and CBD Auckland through its specialist division
  • Industrial real estate, nationally
  • Healthcare, through Extensor's healthcare property experts
  • Specialist real estate where non-market drivers define value
  • Leasehold property and ground rent reviews
  • Compensation assessments for compulsory acquisition under the Public Works Act

Our Team

Extensor comprises of a growing team of real estate experts with diverse backgrounds and skills, each with specific areas of interest and capability

Brett Smithies
Brett Smithies
Gary Cheyne
Gary Cheyne
Vikki Nettleship
Vikki Nettleship
Sean Molloy
Sean Molloy
Lyn Dunn
Lyn Dunn
Diana Koomen
Diana Koomen

Contact Us


Extensor Advisory Ltd
Ground Floor, Shortland Chambers Building
70 Shortland Street
Auckland 1010, New Zealand


PO Box 1877, Shortland St, Auckland 1140, New Zealand