Deputy Prime Minister Angela Rayner also joined the visit.
They visited Newquay Orchard - meeting volunteers, staff and pupils, learning more about the services the CIC offers on site.
Their next stop took them to the Nansledan housing development - and Nansledan School where pupils were waiting to greet them. King Charles reportedly wanted to show the PM and Deputy Prime Minister a project that promotes both traditional materials and sustainable living.
Double call out for coastal emergency services in Newquay
Police are appealing for witnesses after a serious road traffic collision in Newquay
Final journey for Intercity 125
Wishing Well unveiled in Newquay as tributes paid to Lions volunteer
Driver jailed after unsecured drilling rig caused crash that killed Newquay woman
The future of Newquay Zoo is secured after new owner is revealed
Newquay Health Centre invites residents to meeting on renovation plans
Boat declared a wreck and dismantled after sinking in Newquay Harbour
Newquay cliff rescue captured in dramatic photos
Thrill seekers set to take the plunge this New Year
BUDGET 2025: Cornwall to receive £30m ‘Kernow Industrial Growth Fund’
Towan Headland car park to return to Cornwall Council control
Newquay Foodbank launches Christmas campaign as demand reaches new high
Newquay Becomes first town in Cornwall to join national night-time safety scheme
First Bus to withdraw all Cornwall services in 2026
Second platform reopens after nearly four decades
Newquay artist does it again - scooping second national People’s Choice Award
Cornish Seal Sanctuary mourns loss of much-loved resident Sheba
Christmas Present Appeal launched in Newquay
Bodyboard recycling event as calls grow to ban the board