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Hello, We provide planning drawings with external overall dimensions indicated on the drawings as standard. The extra time that it takes to provide this information on the drawings is minimal. Our clients receive fully dimensioned internal dimensioned drawings for kitchen / bathroom designers when the drawings have been submitted to the planning department. After planning is approved we produce the building regulations drawings which have detailed sections and notes. When these are approved we produce heating and electrical layout drawings. In order to reduce delays on site during the construction process we provide a trial dig during the early stages of the design to exposed the existing foundations so foundations can be designed correctly. Drawings should never be scaled because photocopies of drawings can cause stretching of the paper and therefore dimensions can be wrong. Original copies can be scaled but again this can cause errors with measuring where the drawings are less than 1:50 scale

As a norm, Planning drawings does not come dimensioned. You would have needed to ask your architect for detailed construction drawings for the drawings to include all the relevant dims. There is room for errors trying to obtain construction dimensions off a drawing mainly using a scale ruler. Definitely not advisable. I concur with comments by Lucia Pflucker Architecture Ltd above.

It is better that the drawings for planning permission don't have dimensions. This will allow for some flexibility to deal with site discrepancies. The drawings the contractor is asking for are "Tender drawings". This drawings have much more information and are technical. Your architect will take more time and resources to produce this drawings, so yes, you would have to pay further fees for this. If you use planning drawings for the contractor to price or build the project you are likely to have a lot of problems on site. You will also most likely not achieve your vision for the space because what you interpret from this drawings will be different to what the builder reads from them. The builder can apply for building control directly for most things. Otherwise if you want to avoid risks your architect can do it for you for an extra fee. I hope this helps!