The senior and subordinated debt package is understood to be worth between £10 million and £15m and positions the residential letting and property management group to buy up more companies.
Investec is now the main banker for Lomond, which was previously with Bank of Scotland, part of Lloyds Banking Group.
Lomond chief executive Stuart Pender said: "Working with Investec has enabled us to access flexible financing that is suitable for our business and allows us to maintain the strong growth momentum that we have seen already in 2013."
Lomond has a strong position in Edinburgh having bought Braemore Property Management, James Gibb Property Management, The Letting Service and Slater Hogg & Howison.
It snapped up Simpson Brebner and KWAD Property Managers to build a presence in Aberdeen.
It is also active in the Manchester market having acquired Penny Aston and Thornley Groves in Lomond's first move into estate agency.
Across its businesses, Lomond manages more than £1.5 billion of property investments.
Stephen White, associate at Investec, said: "We have been working with Lomond for over a year to ensure that we were able to tailor the most appropriate financing structure to support the company's expansion plans.
"Lomond is an excellent example of the type of entrepreneurial management teams that we at Investec are committed to supporting as they execute their growth strategies."