Extension built and SAP issue

[MarcusFel]

Hi all, first time post to discuss another first for us, an extension.  Other than a bathroom refit the extension was the first largish project we've undertaken.  I saw undertaken, we paid for a building company who drew up the idea, basic plans with description but no architectural plans and then completed the jobs perfectly.  They sorted all the inspections, sign off etc. This was all completed in the summer of 2021 so we're nearly at 2 years complete.

 

I do however have a 3rd party building inspection company still chasing me for sign off.  In the early stages the builder helped with the inspectors questions, like drainage, the insulation in the walls and ceilings.  We even had them round to take a look again and all is fine except one thing.  Apparently we have an outstanding SAP that they cannot find.  The builder advised they sent one in and they would look for it and resubmit but now I can't get hold of them for a reply.  

 

So I'm in a position with a 2 year old extension and no SAP so no sign off.  Spoken to a few companies who are after full architectural drawings and they will then work it all out for us but as per the process we used with the builders we don't have such drawings.  One company without knowing full details suggested it would fail.

 

I guess my question is what are my options in trying to get a SAP on a already built house and extension?  Do we need a SAP?  Someone also mentioned they might be asking for one because the total window area could be over 25% the sqm of the house floor.  

Would that mean if I can prove it not to be the case no SAP would be needed?

 

Happy to pay for a SAP to be completed but concerned in reading online that it might fail and then I'm not sure where we stand.

 

 

[Marvin]

Hi @MarcusFel

 

As I understand it:

 

Does any large extension need a SAP calculation? No. It depends on the amount of glazing. The glazing area of an extension should be no more than a quarter of the floor area plus the amount of glazing that was taken out.

 

So the ball in your court...

 

All answers in squared meters please

Floor area?

Size of windows removed to build the extension?

Size of new windows

 

Let's see where you are first.

 

M

[ETC]

The extension doesn’t need a SAP. If you can’t get your glazing below 25% of the floor area (minus the area of glazing removed) use a calculated trade-off or get a SAP done to do an Equivalent Carbon Target calculation.

 

Most companies shouldn’t need plans - they should come to the house and take a few measurements and ask you a few questions about what insulants you used. 

[Dave Jones]

i dont understand.

 

You say it was all signed off. Then you say another inspector hasnt signed it off ?

 

which ?