Key Takeaways
- The dispute centred on a proposal to extend the front house on a cross‑lease title, add an in‑ground pool, decking and remove a separate garage.
- Sue Lynn Liow and Sai Hoe Tan (the rear owners) refused consent, fearing reduced privacy, altered use of the common area and loss of property value.
- An arbitrator, the High Court and ultimately the Court of Appeal all found that the rear owners’ withholding of consent was not unreasonable.
- The Court of Appeal clarified that the test for reasonable withholding is not “trifling detriment” but a broader, fact‑based assessment of impacts on neighbourhood character, planning rules and future use.
- Property‑law specialist Joanna Pidgeon notes the ruling promotes a more flexible, balanced approach, making it easier for cross‑lease owners to obtain neighbour consent as intensification increases.
- About 18 % of New Zealand’s residential properties are cross‑lease; many were built in the 1970s or earlier and are nearing the end of their economic life, yet redevelopment remains hampered by ownership complexity.
- Martelli and Keith (front owners) bought in 2011; Liow and Tan bought in 2017. The case may return to arbitration to reassess reasonableness under the new guidance.
- No further appeal has been filed at the time of reporting, but the decision signals a shift in how courts evaluate consent disputes in long‑term cross‑lease arrangements.
Parties and Property Details
The litigation involved two neighbouring households sharing a single cross‑lease fee simple title in Remuera, Auckland. At the front of the site, Brett Martelli and Susannah Keith own a 114.5 m² single‑storey weatherboard house with a separate double garage, occupying an exclusive area of roughly 430 m². Directly behind them, Sue Lynn Liow and Sai Hoe Tan reside in a 127 m² single‑storey brick flat that includes an internal garage, with an exclusive occupation area of about 307 m². The cross‑lease structure grants each owner exclusive use of their portion while sharing ownership of the land and common areas.
Proposed Extension Details and Liow & Tan’s Objections
Martelli and Keith sought to modify their exclusive backyard by: increasing the existing house from 114.5 m² to 169 m² (a 54 m² addition); moving the house 1.4 m closer to the rear boundary (instead of the current >6 m setback); constructing a 27.2 m² in‑ground pool just 1 m from the boundary; adding 28.8 m² of decking to link the house and pool; and demolishing the separate garage to improve site coverage. Liow and Tan objected, arguing that the changes would bring the front building markedly toward their property, creating a “tunnel‑like” feeling in the shared driveway, shifting the common area’s use to a focal point for socialising, and potentially diminishing the value and enjoyment of their rear dwelling.
Arbitration and High Court Decision
Initially, an arbitrator considered whether Liow and Tan’s refusal to consent was unreasonable. The arbitrator concluded that the consent had not been unreasonably withheld, noting the modest scale of the proposed works and the lack of substantial detriment to the rear owners. The High Court of Auckland upheld this finding, confirming that the front neighbours possessed the right to alter their backyard as proposed. The judge emphasized that, under the cross‑lease agreement, consent could only be denied on reasonable grounds, and the rear owners’ concerns did not meet that threshold at the time.
Appeal Court Decision
Unsatisfied, Liow and Tan appealed to the Court of Appeal. Justices Mallon, Thomas and Whata examined the broader context of cross‑lease arrangements, highlighting that such titles often endure for 999 years, making it inevitable that structures will require rebuilding or modification over time. The Court rejected the notion that the alteration covenant was meant to freeze buildings in their original form indefinitely. Instead, it held that the starting assumption must be that alterations will be both desired and necessary during the lease term. Consequently, the reasonableness of withholding consent must be judged on a factual basis that weighs the actual impacts of the proposed changes against the interests of all parties, rather than merely looking for any “trifling detriment.”
Legal Principles of Cross‑Lease Alteration Covenants
The Court of Appeal’s judgment reframed the legal test for consent disputes. Previously, a rear owner could block works by showing even a minor inconvenience, which heavily favoured the status quo. The new approach requires a holistic evaluation: consideration of neighbourhood character, applicable planning rules, the intended future use of each property, and the magnitude of any adverse effects. This shift acknowledges that cross‑lease owners must accommodate reasonable development while still protecting genuine, substantive interests. The decision thus provides clearer guidance for arbitrators and judges when assessing whether consent is being unreasonably withheld.
Expert Commentary and Policy Implications
Joanna Pidgeon, a property and business law specialist, praised the ruling as a “much more flexible and balanced approach” that will likely reduce the frequency of deadlock in cross‑lease negotiations. She warned that as intensification accelerates in Auckland neighbourhoods, cross‑lease owners will increasingly face pressure to adapt their properties to meet planning changes and market demands. Consequently, it will become harder for a party to sustain a blanket refusal based on trivial objections; any resistance will need to be grounded in demonstrable harm to value, privacy, or usability. Pidgeon also noted that the decision could help resolve what she described as “more than three decades of frustration” with the inflexibility inherent in many older cross‑lease titles.
Practical Impact on Cross‑Lease Owners and Council Data
National statistics underscore the relevance of the ruling. An Auckland Council report from 2017 recorded 215,958 cross‑lease titles nationwide, with 47 % located in Auckland. Of those Auckland titles, roughly 44 % comprise dwellings built in the 1970s or earlier—many of which are approaching the end of their physical or economic lifespan. The same report described owners’ ability to redevelop as “severely restricted” due to the complicated nature of cross‑lease ownership. By sharpening the reasonableness test, the Court of Appeal’s decision may ease those restrictions, enabling owners to modernise homes, add amenities such as pools and decks, and better align their properties with contemporary living standards without being blocked by nominal objections.
Conclusion and Future Steps
At present, Martelli and Keith have expressed satisfaction with the Court of Appeal’s outcome and anticipate a return to arbitration to determine, under the revised guidance, whether Liow and Tan’s continued refusal remains reasonable. No further appeal has been filed as of the article’s publication. Should the arbitration uphold the extension, the front owners could proceed with their planned house enlargement, pool, decking and garage removal. Conversely, if the arbitrator finds the rear owners’ objections justified under the new, fact‑based standard, the project may be altered or halted. Either way, the case marks a pivotal clarification of how cross‑lease covenants operate in a dynamic urban environment, offering a clearer path forward for neighbours seeking to balance development aspirations with the protection of legitimate interests.