There are many sizes, designs and shapes you could use when building the barbeque. Study carefully the options and choose the one that fits your needs and tastes. Work with great care and judgement if you want to obtain a professional result.
After choosing the right bbq plans for your needs, buy all materials required for the job, to have them at hand when constructing the barbecue island. Measure the opening and the size of the accessories, before fitting them into place. Compute how many tiles you need for your barbeque island, otherwise they might not be enough.
Let the concrete dry out for several days before laying the concrete blocks into place. While the back and the side walls have to be continuous, leave enough space in the front, to install the doors. Before gluing the concrete blocks into place, make sure one last time the appliances fit into place.
Last but not least, cover the exterior faces of the barbeque with bricks. Remove the excess mortar, making sure the lines between the bricks are consistent.