A bit late to this one, but like others, one of my major gripes that would put me off a company is spelling, grammar and layout on a website.
I haven't been through all of it, but in the Case Studies section you have the following
cabinetry from £15000 inc. VAT
Cabinetry from£15,000 inc. VAT
Cabinetry from £4,000 inc. vat
I think case and spacing should be consistent.
In the Painted and oak shaker kitchen case study the description text butts onto the specifications area. I would prefer to see a line spacing at least.
In Testimonials the "Read More Testimonials »" link spills over the image frame (FF 10.0.12) and looks a bit ugly.
In the About page, this sentence seems clunky, I'd break in two
"We offer a tailored design service, taking projects from concept to final completion, including building work, electrical work, plumbing, tiling etc, we will undertake as much or as little as required"
perhaps
"We offer a tailored design service, taking projects from concept to final completion, This can include building work, electrical work, plumbing and tiling etc. We will undertake as much or as little as required."
I think the use of 'immaculate' here is odd, but maybe that's just me - "Our designs are created to endure and immaculate attention is paid to every aspect."
Again in the About page under "Craftsmen"
"All our furniture is hand made within our Essex workshop in the stunning village of Matching Green, by exceptional craftsmen. We use traditional joinery techniques combined with modern equipment and the finest materials to create stunning kitchens."
I would change the first sentence to "All our furniture is hand made by exceptional craftsmen within our Essex workshop in the stunning village of Matching Green", otherwise, to me, it sounds like you consider where the furniture is made to be more important than by who.
Also do you mean to focus on 'kitchens' or would 'furniture' be more inclusive, or a combination of the two.
Lastly I agree with an earlier comment about photography. Perhaps difficult now until you finish more projects, but with kitchens at least I always think people have a somewhat romantic vision of what a kitchen will look like. Without being too arty, or looking too corporate, I would try to grab a few close up shots of some details, things that make you as a craftsman stand out. A joint, a knob, a handle, some clever feature etc - things that evoke an emotional connection and demonstrate why they should choose you, or perhaps pay more for something than they originally intended. In other words, professional brochure type photos.
If you find this constructive I'm more than happy to look over more of it.