Does using a realtor cost more when buying pre-construction?

No. This is the most common misconception in pre-construction, and it costs unrepresented buyers the benefit of representation for no saving at all.

How builders actually budget

A builder’s pro forma includes a line for sales and marketing, and within it a co-operating brokerage commission, the amount paid to a broker who brings a buyer. That line is set before a single home is sold, and the price list is built on top of it.

The commission is therefore already inside the price you are quoted, in exactly the same way the sales centre, the model home, the renderings and the advertising are.

What happens if you come alone

Nothing good, financially. The builder does not hand you the commission as a discount. There is no unrepresented price list. You pay the posted price and the builder keeps the amount they had budgeted to pay a broker.

Occasionally a builder will offer an unrepresented buyer a small incentive. It is almost never the size of the commission, and it is usually a décor credit rather than a price reduction.

Why builders prefer co-operating brokers anyway

It is worth understanding that this is not a loophole you are exploiting, builders actively want broker business:

• Brokers bring qualified buyers, reducing fall-through.
• Brokers handle buyer questions and expectations, lowering the builder’s cost to serve.
• Brokers bring repeat volume across phases and projects.

That is why platinum and VIP allocations exist, and why they go to brokers rather than to the public. How that works.

What you are actually choosing between

Since the price is the same either way, the choice is:

Unrepresented, you negotiate alone, against a professional whose duty is to the vendor, with no independent view of the market, the builder’s record or which amendments are achievable.

Represented, the same price, with someone whose obligation is to you.

Put that way, buying unrepresented is not a cost saving. It is giving something away.

The honest caveat

Representation is only worth having if the person is actually useful. A broker who simply walks you into a sales centre and collects the commission has added nothing. What you should expect is the market context, the builder intelligence, the agreement read commercially, and a clear view of which lots and which phases are worth it. What good representation does.

Ask what someone will actually do for you, and judge the answer.

Register before your first sales centre visit, representation generally has to be in place at or before your first visit to be recognised.