An expert in home improvement will never assume that planning permission will not be necessary for a conservatory.  It may be that planning is not required, but the expert will heck this out with the local planning authority and get the reply in writing, to avoid later confusion.

When they are working out floor space desired in the proposed conservatory, the DIY experts will always work from internal measurements.  They will mark out these measurement where the conservatory is proposed to be built and will ensure that they have enough space.

They will also go to the effort of erecting small cardboard barriers to represent the dwarf walls of the proposed conservatory and will sit down behind these barriers to ensure that their view will not be obscured if the conservatory does get built.

The DIY enthusiast will not automatically select the cheapest quote as being the best.  They will compare quotes with regard to price, the quality of the materials being used, and the reputation of the builder that has quoted.  They know that the cheapest is not always the best value.

It is important to make the effort to blend the new conservatory in with the existing residence.  A home improvement enthusiast will find some similar bricks that were used to construct the main residence and will use them in the conservatory, or will incorporate some other feature of the residence into the construction of the new addition.

Finally, the DIY enthusiast will ensure that the heating pipes in the conservatory are ducted and can be accessed easily.  To cover them with concrete could mean an expensive locating exercise at a later date, should problems occur.