Build me a website

I need a website designed for Gastex Group Ltd. This company will be undertaking Gas and Heating work, like changing boilers, heating and will be mainly in contract work so website will be platform to show big firms that we mean business.

I can send some examples of what kind of website I want. At the moment just want basic website but as company expands will change the website in future, so has to be done in away if later we want to make changes we can do it to current website and not make another one.

I have uploaded the logo