Ms Hart said they had already employed a store manager and a number of part-time staff for the Avenue shop.
She said opening in Whanganui was based on a number of things.
"We wanted an area that would be a great shopping destination for a sample, seconds, sale boutique. We felt with Whanganui being between both Palmerston North and New Plymouth, where we also have boutiques, would be great for those who want to go on a fun shopping expedition.
"Whanganui also has a great number of students and we have always done really well in student areas. That you have a design school in Whanganui was also a big tick in our books."
All KILT garments are designed and made in New Zealand and had reached a point where the company opened its own factory (Made It) last year.
"This was to ensure that we would always be "made in NZ", as more and more clothing is being made off shore and we are losing a lot of skills. We wanted to invest in keeping the industry alive.
"Our pricing is very accessible for NZ-made product. This Whanganui boutique just means that the pricing is even more of a bargain," Ms Hart said.
She said KILT always has its annual sales but the Whanganui shop was its first selling samples, seconds and ale items exclusively.
"It's a very exciting opportunity for us."