A Government minister has said there is an "appetite" to devolve powers to Cornwall and the Isles of Scilly as council and businesses leaders fine-tune proposals to claw responsibilities from Whitehall.
Cities and the Constitution Minister Greg Clark said the Duchy was a "par excellence" example of how regions know better than London about how to run their area.
The Government is in the process of de-centralising power through a series of "deals", giving areas control of policy including transport, training and welfare. Plymouth recently secured a "deal", which will also benefit other towns across the peninsula.
The Cornwall and Isles of Scilly Local Enterprise Partnership is working up a "growth deal", which is to be submitted to the Government for approval by the end of this month. (March 31)
It wants powers to offer more tax cuts to new businesses, a single pot for EU funding, more responsibility for delivering transport improvements and help to pave the way for a space and aerospace "cluster".
Speaking to the Western Morning News, Mr Clark signalled his enthusiasm for their plans.
He said: "Cornwall is a place, from the Government's point of view, where there's been a particular appetite to do a deal with.
"It's a place that exemplifies par excellence my view that the people that know best what is needed for the area are the people who live and work there.
"It's obvious if you are based in Cornwall or the Isles of Scilly your ability to say what intervention, what investment is appropriate, is far more accurate and well-informed than if you are an official sitting miles away in London."
While any agreement would fall short of a Cornish assembly demanded by nationalists, a deal has the potential to hand the Duchy more self-rule than it has known for decades.
The devolution agenda began with "city deals" where England's biggest cities, including Manchester, Birmingham and Bristol, were encouraged to restore their civic pride, and financial fortunes, though strong local leadership.
Now the plan is to get rural areas involved too, and Cornwall is seen as a potential model for other sprawling areas to follow.
Mr Clark also acknowledged the importance of good transport links serving the peninsula, a factor underlined by the collapsed Great Western line at Dawlish. The Cornwall growth deal includes a demand for a central government subsidy for Newquay airport's link to London.
Mr Clark said: "You need to have places that people can do business and have jobs available, but people need to be able to get there.
"One of the things we have seen not just in this country but around the world is the more prosperous places tend to be places that are investing in their connections with other places.
"The whole idea that any city can be a medieval battalion, a walled city where it is self-contained and fortified against arrivals ... that is not the modern world.
"In China, you see cities making fast connections between each other. And that applies right across the UK – that is why I think High Speed 2 is very important to make those connections."
He added: "In the Westcountry, and Devon and Cornwall in particular, transport is going to be central to growth prospects, and in both the Cornwall proposed deal and the west of England proposed growth deal transport features very prominently as you would expect."