Mm. Try Milen Grozev. It's a while since he did work for us, but he did a lot, and it was all good. His company also renovated a village house more recently for a friend; this included underfloor heating. They were very pleased.
Email is email@example.com
Sorry, I can't find his number, but the name of the company is Garanstroy.
There are several good architects in VT