The Laz-7 and Laz-7M were used by the Bulgarian Air Force as a trainer and light bomber, and surplus examples were later transferred to flying clubs, were they remained in use until the late 1960s.

[1][2] On learning of the specification, Tsvetan Lazarov [bg], chief designer of the Bulgarian State Aircraft Factory ((Bulgarian: Държавна самолетна фабрика (Darzhavna Samoletna Fabrika (DSF)), decided to prepare a design to meet this requirement, and he obtained agreement from the management of the factory and the Bulgarian Air Force to do so, setting up a team of designers to work on the new aircraft.

The aircraft was powered by a single Walter Minor 6-III six-cylinder air-cooled inline engine, rated at 118 kW (158 hp) and driving a two bladed propeller.

[2] A second prototype, the Laz-7.2, flew in June 1949 and differed in having a cut-down rear fuselage and more extensive plywood skinning.

[4] The Laz-7M, with its five-cylinder M-11FR engine enclosed by a helmeted cowling, closely resembled the similarly powered early Yakovlev Yak-18.

The resulting aircraft, the Laz-8, was based on the Laz-7.01, and was powered by the Walter Minor 6-III engine and had a fixed undercarriage, but had a revised fuselage with two rows of two seats.

The Laz-8, after being rebuilt as a three seater, served with the VIP flight of the Bulgarian Air Force, remaining in use until 1958.

[2] From 1958, about 120 Laz-7s and Laz-7Ms were disarmed and transferred to aero clubs of the Bulgarian paramilitary organisation DOSO, where they were used for navigation training and glider tugs, remaining in use until the late 1960s.