The phrase 'niche area' is correct and usable in written English.
You can use it when you want to refer to a particular field of activity, topic, or other specialized interest; for example: "Investment banking is a very lucrative niche area in the finance industry."
We doubled the credits, but it's still a niche area".
However, without government intervention it is likely to remain a niche area for the immediate future.
The national drop in applications to medicine degrees has skewed the overall picture, but when this niche area is removed, things look quite different.
"They needed us to round out our operation, and we needed them because things have been getting difficult in our niche area of the music industry".
If you work in a new or niche area, you might want to consider starting your own social network where people can discuss your product, mission and the industry.
Baker Small was the most prominent law firm in this niche area, and its success rested largely on its ability to help local authorities cut the costs of SEN provision.
The good news for the Natural Environment Research Council's decision to crowd-search a name for its latest polar research vessel is unprecedented public engagement in a sometimes niche area of scientific study.
I had become recognised as one of the world's leading experts in a niche area of applied physics; my papers were being published in the top journals; and I was getting invitations to all the glitzy conferences.
I was submitting two or three bids a year, but the outcome was always the same: top marks for scientific quality, but working in such a niche area meant phrases like "limited impact" and "few citations" were inevitable.
