Councillors have unanimously granted planning permission for the £68.7 million building project to replace Perth High School.
Perth and Kinross Council's planning and development management committee approved the plans on Wednesday, March 16.
Councillors shared their delight at the plans being progressed to the next stage and the promise of no unplanned "swimming pool" in the new model.
The triangular-shaped building will be built over three levels to Passivhaus standards.
Inflation increases and a rise in construction costs has seen the projected cost soar from £50 million to £68.7 million in less than a year.
The project is being funded by a partnership between PKC and the Scottish Government. PKC is funding the £68.7 million to build the school while the Scottish Government is providing revenue funding of £40.6 million to help pay for running it over the next 25 years.
Scrutinising the plans at this week's meeting Perth City South Lib Dem councillor Willie Wilson raised local concerns about parking provision for both pupils' and contractor vehicles. He referred to issues with vehicles during construction works at neighbouring Oakbank Primary School.
Planning agent Kevin Cooper told the committee there would be additional parking provision at the top of the site.
He added: "Inevitably there will be a bit of disruption [during construction] but I am sure the contractor will do their best to minimise it."
Council officers said they were "very aware" of parking issues in the area. As well as additional parking being provided on site the council will look at the use of park and ride, car-sharing, etc with the council's focus being on sustainable modes of transport.
Tongue firmly in cheek Conservative Almond and Earn councillor David Illingworth made reference to the school's current leaky roof and asked: "For nearly 50 years now S1s coming to the school have been told there's a 'swimming pool' on Level Four. Will the new school have such a feature?"
Smiling, an officer told him firmly: "No! There will be no swimming pools on site and very much improved drainage, roof quality, etc. so yes, we're quite confident."
The new school will be built within the western part of the grounds of Perth High School which sits on Oakbank Road.
Pupils will continue being taught in the current school building - in the southern part of the site - during construction.
Once complete the old school building - built in 1971 - will be demolished.
Moving the plans for approval convener Roz McCall was "delighted" to see this coming forward. Seconding Conservative councillor Bob Brawn said it was "an important development for Perth".
SNP councillor Tom Gray said: "It's been a long time in coming forward and I'm sure like everyone we're looking forward to this Passivhaus futuristic design."
Cllr Illingworth added: "My own children received an extremely good education in the old building and I'm sure future generations of schoolchildren will appreciate the education that they will receive in the new building."
Local councillor Willie Wilson welcomed plans being progressed for a school building "fit for this century" and added: "I'm delighted we have got to this stage.
"It's a huge development and a major step forward and I think can only enhance the learning offer at Perth High School which is already excellent."
The new school is scheduled to open some time in the summer of 2024.
Following the meeting a PKC spokesperson told the Perthshire Advertiser : "Work continues on the project with a currently programmed completion date of summer 2024. The capital cost of the building is funded by Perth and Kinross Council and the Scottish Government will provide £40.6 million revenue funding over 25 years to maintain the building."
