I got the dating from this company http://www.tree-ring.co.uk/. I had to
provide oak with 80-100 rings. I was replacing steps in the spiral
staircase and joists so it was easy to send slices. Otherwise you would
have to get a core drilling. When I did it it was no result - no fee.
I have been talking to an architecte de patrimoine, who proposes working
with me on a consulation basis but not until he has finished other projects
next year. He would negotiate with artisans for me if necessary. He said
the percentage thing was less appropriate because the project is midway,
not at the beginning. Could you put veluxes in the appentis, or give it a
glass roof to get more light into the garden side? Rather depends where the
light is coming from. I have a similar problem.
I had a look at the MPF link you sent me. Raising the roof like that was a
very neat idea for the penty. My house is more in style like the Manoir de
Locmaria, except it is in a village, and half of it was knocked down and
then rebuilt without any architectural splendour. I bought it (the later
bit) when it came on the market because I had blocked doorways to it and it
had taken a chunk out of my garden. I have lost the pointed roof on my
tower, but I do have a garde robe toilet!
Re planning permission - I have found if you go and talk to your planning
people and/or the town hall they are very helpful. In my village they are
more concerned with the houses being maintained and occupied than
authentic. (There are some horrid new windows, and plastic covered external
I wish you strength to your elbow