"Unprecedented" demand at the site has lead to Macquarie Home Stay submitting an amended development application to Dubbo Regional Council to increase the number of accommodation precincts at the site.

It would allow for up to 63 accommodation units to be constructed.

One of the new proposed areas is a 26-unit precinct for cancer patients to tie in with the Western Cancer Centre under construction at Dubbo Hospital.

Macquarie Home Stay already expects it to be near capacity all year round.

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There are also plans for a 14-unit precinct with one and two bedroom spaces and another family precinct with five units.

"We had just nine empty rooms across the whole month of May and have turned away an astounding 103 bookings - that's unprecedented and a massive concern," Mr Crowfoot said.

"We have patients again choosing whether to have their medical treatment or not based on the potential cost. That's exactly what we have been trying to alleviate over the last two years."

The managing director said there there were patients, children, partners and carers who had been sleeping in their cars in the hospital car park or on waiting room chairs because suitable accommodation was not available.

Mr Crowfoot also highlighted the demand Macquarie Home Stay is experiencing when he spoke at a recent Dubbo Chamber of Commerce business breakfast.

Even in March the facility had more than a 95 per cent occupancy rate, with an average of two people per day having to be turned away.

"If somebody was prepared to write me out a cheque today to help me build all these [units], by the time they were built we would be at the point where we could actually fill all of them," Mr Crowfoot said.

"There's no question that the demand is there. We're going through a growth phase and we need to build a whole lot more to accommodate the people who need to come and stay with us."

He shared the story of the accommodation facility's longest resident to-date who stayed for 28.5 weeks last year.

"He was at a point where he could have made the choice to receive treatment or not to receive treatment because he couldn't afford it. Because of what we're able to offer he was able to receive treatment," Mr Crowfoot said.

Although the treatment wasn't able to cure him, Mr Crowfoot said the important thing was that he gave it a "red-hot crack" to get better and his financial costs weren't a reason for him not being able to try.

While the amended development application is currently before council, construction will not go ahead until the organisation is able to raise funding.

Macquarie Home Stay board of directors president Dawn Collins said donations and sponsorship would all go towards the next stages of construction.

"As a local not-for-profit charity we have been enormously proud to receive the financial support from not only the Dubbo community but also the wider western and northern NSW communities who can access our facility," she said.

As well as encouraging donations, Macquarie Home Stay is also seeking financial support through avenues like grants.

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