For designing layouts you need to convert PSD Document to HTML file. For converting in HTML file you need to do some kind of HTML coding for making it attractive. HTML and CSS are most popular and easiest way to design layout of any website. So HTML coding is also required for designing from this way.
We at HawksCodeSoftwares Pvt. Ltd, UK are also providing this service. Our designers are also using tool with coding to design the HTML layouts. We are using tools that automatically convert the documentation to HTML layouts. Our designers also use HTML coding to design the layouts because it is the best way to design layouts.
Automatic conversion tools are used by many designers. If you are ready to compromise with quality, you can use these tools. These tools are very convenient if you don't know anything about coding. If you have little bit knowledge about coding than you can use HTML coding so that you will learn basic of it. Basics are required to learn for designing so that you can easily design any kind of layouts.