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对于希望增加平方计量的房主来说，只有两种选择：延伸底层或“扩建”。但是第二层楼的价格是多少？
三家专门从事扩建和二层增建的建筑商表示，成本可能会有很大差异- 从每平方米1,800澳元到15,000澳元不等。这取决于“难度”，添加的房间类型和完成的质量。 总部位于加尔斯顿的Turrell Building Services的总经理Neil Turrell表示，建造第二层楼层比扩建底层楼层更为昂贵，这是一种常见的误解。 “最简单的经验法则是，拆除现有屋顶覆盖物和框架的成本，加上放置托梁和新的底层地板，通常可以抵消从头开始建造的成本：挖掘，模板，混凝土成本等，“他说。 “当然，每项工作都是独一无二的，但这是一般原则。” Turrell将每平方米的楼层成本增加约2,500澳元，“100平方米相当于约250,000澳元，这大约相当于第二层楼层的平均尺寸。” 他补充说，另外需要增加价值10,000到15,000澳元的工作，用于楼下通道和管道等地下工程。 珀斯Amerex Renovations and Additions董事总经理史蒂夫伯克说，“上涨”，通常使用轻质木框架，每平方米售价在1,800澳元至3,000澳元之间。 “与底层扩建不同，第二层通常不需要浇筑任何地基或混凝土板 - 这是一个很大的节省，”他说。 
“楼上需要哪些房间对您的第二层楼房成本影响最大。例如，是否有主卧室和套间，儿童卧室和浴室，独立卫生间，活动区？
“这是您在早期阶段与设计师和建筑师进行交流的内容。从本质上讲，添加量越大，成本就越高，“伯克说。 专注于豪华住宅建筑的墨尔本Mazzei Homes总监Daniel Mazzei表示，“基本第二层”的起始价格约为每平方米15,000澳元。 “这将是一个入门级楼梯，屋顶设计，外部覆层和最少量的补救工作，”他说。 “更复杂的增加，例如现有维多利亚州物业的超现代扩建，状况不佳，可能会达到每平方米40,000澳元以上”。 设计和建筑费用，总体布局，所需钢材量，现有底层条件，外部覆层，内部饰面，内部夹杂物，场地通道，建筑工人的质量和现有的房屋补救工程都会影响添加地板的成本，Mazzei说。 For home owners looking to add square meterage, there are only two options: extend the ground floor or “go up”. But how much does a second storey cost? Three builders who specialise in extensions and second-storey additions say the cost can vary dramatically – from $1,800 to $15,000 per square metre. It depends on the “degree of difficulty”, the types of rooms added, and the quality of the finish.
此文章出于 <Clancy Yeates, APR 22, 2019> Neil Turrell, managing director of Galston-based Turrell Building Services, says it’s a common misconception that building a second storey is more expensive than extending the ground floor. “The easiest rule-of-thumb is that the cost to remove the existing roof covering and framework, plus putting down joists and a new sub-floor, can generally offset the costs involved in building from the ground up: excavation, formwork, concrete costs etc,” he says. “Every job is unique, of course, but that is the general principle.” Turrell puts the cost of adding a storey at about $2,500 per square metre, “so 100 square metres equals about $250,000, which is around the average size for a second storey addition.” Another $10,000 to $15,000 worth of work needs to be added, though, for lower-ground floor works like stair access and plumbing, he adds. Steve Burke, managing director at Perth’s Amerex Renovations and Additions, says “going up”, usually using a lightweight timber frame, can cost between $1,800 to $3,000 per square metre. “Unlike a ground floor extension, a second storey does not normally require any foundations or concrete slab to be poured – this is a big saving,” he says. “Which rooms you require upstairs will have the most impact on your second storey costs. For example, will there be a master bedroom and ensuite, children’s bedrooms and bathroom, a separate toilet, an activity area? “This is something you would talk through with both your designer and builder in the early stages. Essentially, the bigger the addition, the more it will cost,” Burke says. “Unlike a ground floor extension, a second storey does not normally require any foundations or concrete slab to be poured – this is a big saving,” he says. “Which rooms you require upstairs will have the most impact on your second storey costs. For example, will there be a master bedroom and ensuite, children’s bedrooms and bathroom, a separate toilet, an activity area? “This is something you would talk through with both your designer and builder in the early stages. Essentially, the bigger the addition, the more it will cost,” Burke says.
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