How the cheaper option becomes more expensive?

I get this question a lot. What's the difference with cheap materials and more expensive materials here is

my responce.

Comparing Apples with Apples.

All companies specify their builds differently which can be frustrating when clients are trying to compare quotes. Don’t be tempted to go with the cheapest price, you will end up paying for it down the track or making avoidable compromises because your build has gone over budget. When it comes to costing options, we look at two main areas…

The Specifications of the build

All companies specify their builds differently, which can be hugely frustrating when you’re trying to compare homes and pricing. Unfortunately, many companies don’t include critical construction costs in their estimates. This is great for them when they know they’re being judged on square metre rates or ‘build cost,’ because everything appears much cheaper than it will actually be when the build is complete. But it’s not so great for you, the client.

To avoid falling prey to hidden costs in any verbal or written build estimate, you MUST find out ‘what is NOT included in the price’. Once you have this list (and yes, it can be a long one), you’ll need to put realistic budget costs against each one, giving yourself a more accurate estimate of the total build cost. Some of the common things that may or may not be included in an estimated build price are: excavation and site works; drainage; decks; appliances; window coverings; scaffold costs; basic landscaping and fencing.

Another area of consideration is in the quality and quantity of fittings used. What are the company’s standard specifications? With spec home companies, upgrades can be very costly if you make variations to their fixed plans. Electricals are a great example of this. While just about all companies use LED lights these days, there are vast differences in quality and, more importantly in a new home, in quantity. If a company wants to reduce the electrical cost in its estimate, the easiest way to do this is to reduce the number of lights and power points. Worse still, they may choose not to include ‘as standard’ things like network cabling, outside power points and dimmer switches in main areas.