An anti-slavery charity bidding to set up a safe house in Bristol for trafficked children, has raised £34,000 towards its target of £100,000.
The charity, Unseen, said 549 children were uncovered as having been trafficked into the UK in 2012.
Among the reasons were forced labour, sexual exploitation and cannabis cultivation.
Unseen's Kate Garbers said the options for those trying to place such children were "incredibly limited".
"That's one of the main reasons why Unseen decided we needed appropriate accommodation for children, and we have worked closely with the local authority and the police to design that," she said.
The safe house will be designed to accommodate four children at any one time, with support staff and carers available around the clock.
Last August the government announced tougher sanctions would be introduced to tackle modern-day slavery in the UK.
One of the proposed measures is to increase maximum custodial sentences for offenders from 14 years to life.