nz_rental_tools

New Zealand tenancy and property utilities for Dart. Provides bond calculations, rent increase validation, Healthy Homes Standards compliance helpers, and Tenancy Services reference data.

Built for NZ landlords, tenants, and property managers.

Features

Bond calculation — Maximum bond based on weekly rent (4 weeks under the RTA 1986)
Rent increase validation — Check the 12-month rule and 60-day notice period
Earliest effective date — Calculate when a rent increase can take effect
Healthy Homes Standards — List the five compliance categories
Notice period constants — Tenant (28 days) and landlord (90 days) notice periods

Getting started

Add the package to your pubspec.yaml:

dependencies:
  nz_rental_tools: ^1.0.0

Then run:

dart pub get

Usage

import 'package:nz_rental_tools/nz_rental_tools.dart';

void main() {
  // Maximum bond for $650/week rent
  print(maxBond(650)); // 2600.0

  // Check 12-month rent increase rule
  final lastIncrease = DateTime(2025, 3, 1);
  final proposed = DateTime(2026, 4, 1);
  print(isRentIncreaseValid(lastIncrease, proposed)); // true

  // Earliest date a rent increase can take effect
  final notice = DateTime(2026, 2, 14);
  print(earliestRentIncreaseDate(notice)); // 2026-04-15

  // Check if 60-day notice requirement is met
  final effective = DateTime(2026, 5, 1);
  print(hasSufficientRentIncreaseNotice(notice, effective)); // true

  // Healthy Homes Standards categories
  print(healthyHomesCategories());
  // [Heating, Insulation, Ventilation, Moisture ingress and drainage, Draught stopping]
}

See the example/ folder for a complete working example.

Reference

Additional information

This package is maintained by UnitHub, an AI-powered property management platform based in New Zealand.

For bugs or feature requests, open an issue on GitHub.