My Property Box has seen a rapid rise in demand for its services, which has resulted in a 50% increase in the number of landlords requiring the Company's expertise over the last year.
The business, which celebrated its fourth anniversary last month, has invested in its fleet of vehicles, and professional development of team members.
Managing director of My Property Box, Ben Quaintrell, believes the reason for the continual development of the firm is down to its consistently good customer service and dedicated team.
He said: "We have had a fantastic start to the year and I'm thrilled with the progress the company has made.
"We have expanded our geographical area due to the increasing demand for our services outside of Darlington, and we plan to keep growing as we're aiming to be the UK's number one letting agency."
Following a highly successful first six months of the year, Ben decided to heavily invest in the business and recently purchased two new company cars.
He said: "The new cars have enabled us to enhance our services and they both reflect our unique and fun brand which highlights our customer-focused approach to lettings."
The property entrepreneur believes the North East is an ideal place for property investment, and despite Brexit he feels there is going to be a continuous demand for rental properties.
He added: "I'm feeling very positive about Brexit because the lettings industry has always thrived, even during the recession.
"The North East is the best place in the country for property investment and if anyone is thinking about purchasing a buy-to-let property, now is the perfect time to do it."