Harrogate finished second in the regular season, five points in front of Brackley, who ended up in third spot but who also have a first-ever Buildbase FA Trophy Final to look forward to on May 20th.
And it was the Northamptonshire club`s Danny Lewis who was the first goalkeeper to be called into action in the 6th minute when Dominic Knowles` flick-on was collected by George Thomson, whose shot was turned behind by the former Kidderminster Harriers` number one.
But Harrogate suffered a blow in the 12th minute when striker Mark Beck had to be carried off on a stretcher after suffering an injury and was replaced by Jake Wright.
The hosts had a let off in the 19th minute when skipper Josh Falkingham was in the right place at the right time to head Alex Gudger`s effort off the line.
However, 6 minutes later, Harrogate broke the deadlock when the referee awarded a soft-looking penalty for handball and Knowles coolly slotted home the resulting spot-kick.
Simon Weaver`s side almost doubled their advantage on 34 minutes when
Knowles capitalised on a defensive mistake and went through on goal but dragged his effort wide of Lewis` post.
But 6 minutes later, Harrogate did make it 2-0 when Brackley failed to deal with Joe Leesley`s free-kick and the ball fell kindly to Knowles, who beat Lewis from close range to notch his 9th goal in three games.
In first half injury-time, Harrogate suffered another injury blow when Jake Wright, who had come on early to replace Beck, was also forced off on a stretcher and Lloyd Kerry came on in his place.
Nine minutes into the second half, Lee Ndlovu had a great chance to pull one back for the visitors` but he couldn't keep his effort down and it sailed over James Belshaw's goal.
Three minutes later, Harrogate came close to making it 3-0 when Leesley picked out Thomson, who found himself free at the far lost, but his header was deflected wide of Lewis` post.
Brackley needed a goal soon and they almost succeeded on the hour-mark when Shepherd Murombedzi whipped in a dangerous cross and after a mass scramble in the Town box, sub Lloyd Kerry made a superb last-ditch tackle to deny Ndlovu.
The game was virtually put to bed by the hosts on 71 minutes though when Ryan Fallowfield`s cross found Leesley, who found the bottom corner of the net to make it 3-0.
Five minutes from time Jack Emmett almost added a fourth for Harrogate, but his effort cannoned back off the post.
But a fourth goal would have cruel on a Brackley side who competed well throughout and who, despite this loss, have enjoyed a terrific season which could get even better later this month.
As for Harrogate, the decision to turn full-time has certainly paid dividends as they will be plying their trade at the top level of non-League football next season.
Photo: Town Pix