Community contributors: Lisa 欧, 昆哥
Summary
Key Points
Why it matters: 为计划在后院增建独立居住单元的房东提供常见建筑面积规格与图纸设计报批实操经验，提升土地利用价值。
在自家后院增建奶奶房（Granny Flat）是提升房产价值与租金回报的常见策略。实践中，60平方米是较为标准的二级居住单元建筑面积上限。房东在规划阶段应优先寻找有经验的建筑设计师绘制施工图纸并提交审批，同时考虑到优质设计师的项目排期，建议提前做好时间规划与预算准备。
Practical Takeaway
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Disclaimer
This note is edited by APOA from community discussions with private details removed where possible. It is general information only and is not legal, tax, financial, or property management advice.