The brick wall should have a thickness of 900 mm. If you can still argue with me, then there is no SNiP. Such thickness should be adhered even when using large -format hollow bricks. But the strength of the building up to three floors is achieved by a lower wall thickness. It is better not to bother and build 900 mm thick.
There are several options for minimizing the material, subject to all rules and regulations.
You can use large -format blocks with voids. The presence of voids increases thermal insulation and reduce the density. Walls of such material can be supportive.
The use of double masonry will save bricks and achieve the desired thermal insulation effect. Carrying masonry and outer are laid out, and the insulation is laid between them.
Can be laid with a heater facade of the structure. For example, recently, a foam is more often used. This technology will help to reduce the thickness of the wall, and will not affect the thermal insulation of the structure. The brick structure has always been considered solid and rich. So for comparison, open the ads and see the difference in the prices between the brick and concrete structure. Brick can decorate the facade of the building and much more.