Is fixing a gable end crack a specialist job, or could most builders do it?

[Orangetapemeasure]

We bought a house with a full height, but barely visible crack (I can't actually see it) in the gable end - we had it fully assessed and were quoted £15k to fix it by the Chartered surveyor who did the survey. We have continued to use the chartered surveyor to co-ordinate with specialist builders to get it fixed, but we are 6 months down the line don't seem to be getting anywhere ie no start date, minimal communication. We were given the impression that because its an old house (17th c) this was a specialised job, but I've now had a couple of conversations with other people who have implied that any competent builder could fix this. Thoughts wise MNers?

I wonder whether, given the age of the building, you could contact the listed building owners club for advice.
In a standard modern house I think a good builder could do this, wall ties and structural support etc...
In a building of that age I'd want to check further as construction methods and materials would need to be well considered and lots of bog standard builders have no experience in being sensitive to the specific issues an old building might present.

This, definitely.

You've bought a 500yr old property, you have a responsibility to maintain it properly and to employ builders who know what they're dealing with.

if you're spending £15k you will also want to make sure that the work has a reasonable guarantee on it.

Maybe ‘copy & paste’ here a few of the contract details such as construction techniques, materials, etc which are relevant?