Agreed, more info would help.
Brick walls can be a challenge...you could buy a top-notch wireless router, and still have issues. No way to easily say.
If there is a power outlet somewhere in the area, powerline adapters would be a good choice (assuming you can't easily run a data cable). From the powerline adapter, you can plug in access point/range extender.
The other option would be a true mesh (wireless) setup...but for mesh to work well, each AP needs good reception...so that may be risky too, unless you can strategically get a signal through a door or down a hall.