Before starting a building fit-out in New Zealand, there are several important factors to consider.

Here are some key points to know:

1. Building Regulations: Familiarise yourself with the local building regulations and town planning requirements in New Zealand. Each region may have specific guidelines that you need to adhere to.

2. Resource Consent: Determine if your fit-out requires a resource consent. Certain types of alterations or changes may need to go through a resource consent process before you can proceed.

3. Building Permits: Understand the process for obtaining building permits. Depending on the scale and nature of the work, you may need to obtain building permits from the local council.

4. Professional Assistance: Engaging the services of an experienced architect or designer is advisable to ensure your fit-out meets regulatory requirements and is functional for your intended purposes.

5. Tradespeople and Contractors: Identify reliable and reputable tradespeople and contractors who can carry out the necessary construction, plumbing, electrical work, etc.

6. Timeframe: Establish a realistic timeframe for your project. Building fit-outs can take anywhere from a few weeks to several months, depending on the complexity of the work and availability of resources.

7. Budgeting: Budgeting for a building fit-out can vary widely based on factors such as size, complexity, location, materials, and quality of finishes. It is recommended to consult with professionals or contractors to get accurate cost estimates for your specific project.

The cost of fit-outs in New Zealand varies greatly depending on the size, quality, and complexity of the project. However, please note that these are just rough estimates and it is crucial to obtain detailed quotes from multiple contractors to create an accurate budget for your specific requirements.

Remember, it is always best to consult with professionals who can assess your specific project and provide more accurate cost estimates based on your needs.