Every reuse choice gains something and gives something up. We make the trade-off visible, in numbers.
02 · Economic chains
A heritage building sits inside a network of crafts, trades and services. The right use strengthens that chain.
03 · Regional sectors
Uses aligned with the industries that already drive the city or region last longer and earn more.


The first study before any design. Candidate uses for a heritage building are scored on five weighted dimensions. Any use that falls below a heritage threshold is ruled out, however much it earns. The result: a ranked list of uses, with the opportunity cost of each.
Does the use respect what makes the building significant?
Does it fit the prevailing value system and every context around it?
Who benefits, and does the community carry the use forward?
Income, economic chains, regional sectors and opportunity cost.
Can it be built, approved, operated and maintained?
The uses your building and its setting can really carry, and the ones to avoid.
The cost of each choice
What each use gains and what it gives up, for the building, its street and its owner.
One clear recommendation
A written recommendation you can take to design, funding or approval.

Families, endowments, institutions and investors deciding what a historic building should become.
Bodies setting the future of heritage sites, streets and districts.
Architecture and engineering firms that need a heritage reading inside their bid.
2025
Opportunity costs, economic chains and alignment with leading regional sectors, illustrated through New Zealand cases. International Design Journal 15(6).
PhD 2014 · published 2018
The community's prevailing value system as the context that shapes every other one, read first, before any use is chosen.
Every Rithu service stands on one of four published frameworks.
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