You sound like the perfect writer for a client of ours! I'm writing from an agency in Bristol, and we’ve got a client who designs and build luxury conservatories and orangeries.
I’ve been asked to try and find a writer for both their blog and to give to our SEO guy to boost his efforts. Your profile shows that you've got a lot of knowledge of construction/design (albeit with much larger projects!), so I thought I’d ping to a message to find out a little bit more about yourself, your experience and your pricing!!
Let me know if you'd be interested!