What really affects the cost of a landed rebuild?
真正影响有地住宅重建成本的因素有哪些？
Why floor area alone is not enough, and which assumptions should be tested early.
为什么不能只看建筑面积，以及前期应验证哪些成本假设。
Floor area is only the starting point
建筑面积只是起点
Floor area helps establish scale, but two houses of a similar size can have very different costs. Site access, structural systems, facade complexity, services and finishes can materially change the work involved.
面积有助于判断项目规模，但面积相同的住宅也可能成本差异很大。现场出入、结构体系、立面复杂度、设备系统和饰面标准都会影响工程量。
Six major cost drivers
六项主要成本因素
- Condition of the existing building and demolition requirements现有建筑状况与拆除要求
- Ground conditions, foundations and structural design土质、地基与结构设计
- Site access, storage and delivery constraints现场出入、材料存放与运输限制
- Architectural form, facade, roofing and waterproofing details建筑形态、立面、屋面与防水细节
- Mechanical, electrical and specialist systems机电与专业设备系统
- Finishes, fittings and owner-supplied items饰面、固定装置及业主自购项目
Allow for the complete project
预算应覆盖完整项目
An owner budget may also need to consider consultants, investigations, submissions, temporary arrangements, utility work and contingencies. The exact list depends on the project setup.
业主预算还可能需要考虑顾问费用、调查检测、申报、临时安排、公用设施工程和预备金，具体项目因实施方式而异。
Ask what is included, excluded or still assumed whenever you compare early figures.
比较前期数字时，应明确哪些内容已包含、未包含或仍基于假设。
How to get a more useful early assessment
如何获得更有参考价值的前期评估
- Share the property address and any available plans.提供房产地址和现有图纸。
- Describe the outcome and approximate floor area you want.说明目标成果和大致建筑面积。
- Provide site photos and known constraints.提供现场照片和已知限制。
- Separate must-haves from optional features.区分必要需求与可选配置。