You could attempt to "patch in"...but that would take plenty of planning and expert flooring repair skills. A competent professional can repair or "patch in" almost any flooring and make the repair invisible to the casual observer.

Another option for you, if you don't want to walk on bare concrete, would be to purchase some cheap vinyl at a big box retailer and throw it in. Then you simply pick it up and throw it out when time comes for the remodeling job.

From a professionals point of view. I would wait untill all demo is done. It will be cheaper in the long run. Unless you are installing yourself. My company can charge upwards of $100 per sq ft. To patch in. That might be on the high side but it gives you an idea.

Thank you both. Alas, that's pretty much what I thought the answer would be. I guess it'll just have to wait another year.

Partial flooring installation,Really a bad idea you can take demos and consult with the experts.