Mansion winner Becca Pott with husband Ben and their daughter Ava, celebrate outside their new home. PHOTO: Jam Press/Omaze

A lucky British couple won this lavish house in UK with just a $13 ticket.

Becca Pott, husband Ben and their 8-month-old daughter Ava are shifting from a tiny two-bed flat in East London to this five-bed, four-bath mansion.

The lavish home has a private garden and outdoor area surrounded by established trees. PHOTO: Jam Press/Omaze

Pott, 32, from southeast England, entered the Omaze Million Pound House Draw.

But the family nearly missed out on the big prize, according to Jam Press.

This is the moment winner Becca Pott and her family from Leyton, East London, find out they've won an amazing house in Ascot. VIDEO: Omaze UK

“My husband [Ben] had entered every Omaze Million Pound House Draw prior to this one, but somehow he’d forgotten to enter on this occasion,” she said.

“But luckily I decided to buy a £10 ticket bundle in January without him knowing after seeing the house on television,” Becca told Jam Press. “I’m never going to let him live this down!”

Becca and Ben are happy that Ava is set for life in their new property. PHOTO: Jam Press/Omaze

The upscale property is in Queen’s Hill in Berkshire’s highend Ascot neighborhood, just a short distance from the world-famous Ascot Racecourse.

The stucco home in white has a private garden, high coffered ceilings throughout and a state-of-the-art kitchen.

“This win is truly life-changing for us,” Becca said. “We’ll stay here and enjoy the house for the summer at least, but whatever we decide to do, we know Ava is set for life.”

The 5-bedroom home also has a lift in the foyer. PHOTO: Jam Press/Omaze

The campaign has a bigger purpose too. It brought in funds for Cancer Research UK, netting the charity donations of nearly $680,000.

This amount will help fund projects including TRACERX, the largest genetic study that researches how lung cancer evolves and why treatments stop working, reported Jam Press.

READ MORE: New York Post