Construction costs for ECC are much higher than for standard concrete, so your proposal is probably not justifiable on economic grounds.

ECC 的施工成本比标准混凝土高得多，所以从经济上讲你们的建议可能不合理。

Since then construction costs alone have tripled.

但自此光建造费用就已是预期的三倍。

So how to effectively control or reduce construction costs?

那么怎样才能有效控制或降低建筑施工成本呢？

However, this Posting also includes the construction costs from expansion work.

然而，这还包括邮寄费用由施工扩建工作。

They will do it as long as the home price is high relative to their construction costs.

只要房价相对建筑成本有利可图，建造商们就不会停止步伐。