The phrase 'a completely new design' is correct and usable in written English.
You can use this phrase when describing something that has been redesigned with new features or has been created from scratch. For example: "The team worked hard to create a completely new design for the website."
Odeo, a podcast directory founded in 2005 by Evan Williams of Blogger and Twitter fame that was acquired by SonicMountain over a year ago, has relaunched with a completely new design and slew of features.
A completely new design was started soon after the Chrysler deal was completed and was still being fine-tuned late last year.
Having taken over from Radioshack-Nissan, Trek Factory Racing had the opportunity to come up with a completely new design.
There was a lot of pain last year but now we have a completely new design and philosophy so we need time to explore the potential.
In the past, as many as four years of planning and new tool purchasing were needed for a completely new design.
After the huge success of 2014's iPhone 6 – which introduced a completely new design with larger screen sizes, attracting more people switching from rival Android phones than ever before – 2015's iPhone 6S has been a bit of a damp squib in terms of consumer buzz.
Besides all that, the Port Imperial has a completely new design--a concept that popped into the head of Luther Blount, a distinguished shipbuilder in Warren, Rhode Is.
NEC has already an improved version for SX-6 and Azama servers, the PVFS group will present a completely new designed PVFS2 soon, and Lustre is of cause an ongoing development as measured the first beta version of Lustre Lite.
A device of completely new design for direct stimulation of denervated muscles is being tested in animal studies.
It's completely new design, code, architecture, and infrastructure.
It generates completely new design opportunities for MIM products of functional materials.
