Building an extension. Are drawings required?

[Torquey]

Sorry for the boring post but I'm struggling to find this info anywhere.

I want to get a sunroom built on the rear of my house. 3 x 3 meters (it falls within permitted development).
I've managed to get a quote from one company with just some nice chap coming to the house and taking a few measurements. No mention of drawings.

I then tried a local reputable builder who said they wouldn't do anything without drawings, and then proceeded to give me the number of his recommended architect.

Am i right to think that:
I only need an architect to provide drawings if I'm using a builder?

If I'm using a larger company then they will not require plans and do it to their own (agreed) specification?

If the above is correct then is it worth taking the chance on paying £400 for drawings first and then finding a builder £400 cheaper than a bigger company?? It just seems like catch 22.

[Equus]

Technically, you don't need drawings if it's PD under Planning: Building Regulations can be done under a Building Notice and if it's really simple, then yes, you can just agree the design and specification verbally with the builder.

Is it a good idea to enter into a contract with a builder that is entirely verbal and unsupported by even simple drawings? I'd say that a few £hundred for plans is good insurance, but then I'm biased, I guess!

[Drumroll]

Would never dream of doing an extension without drawings. If no drawings how do you know/prove the work has been done right?

Don't get me wrong, badly drawn up plans are a nightmare, but at least you have something to argue/measure against.

[anonymous-user]

Go for it OP. But be aware of what will happen....

[Torquey]

Thanks very much.
So it sounds like drawings/plans are the first step.

The company I got a quote from is very well known in this field, however you do have a point. I don't have any garentees what the end product will be, although what we discussed sounded perect.