Extension - few questions

[Steveb21]

Red = New area
Yellow = Change of use for room​

I am having thoughts about extending my bungalow.
Extension will go to the side where there is currently a 2nd driveway.

The double garage external wall is a single brick wall.
The front of the garage where there is currently x2 double up and over doors will be blocked and replaced with a window.
The internal walls I believe will need to have batons installed, insulation added and then plaster boarded.
The floor is already levelled with concrete.

New area is 48.75m2
Garage area is 30.25m2
Total area of 79m2​

Roof will be flat EPDM with a lantern, rear of extension will be bi folding doors.

I have 2 approx. quotes for the work - both quotes are miles apart.
As you can see from the diagram, the majority of the walls are already up.

I have a architect to draw up plans soon, but what kind of approx. figure should I be looking at for the building work?

 

[Leofric]

Is the kitchen big enough Ask the architect to come up with some alternative floor layouts.

 

[Steveb21]

Is the kitchen big enough Ask the architect to come up with some alternative floor layouts.

It will be a open plan kitchen, living and dining area in one.

 

[HERTS P&D]

What are the quotes that have being given by the people who have visited the site???

Andy

 

[^woody^]

It all depends on whether the designer it's specifying plastic plug sockets or brushed stainless steel.

 

[Steveb21]

What are the quotes that have being given by the people who have visited the site???

Andy

£33k and £110k ! (Both excluding kitchen)

 

[Steveb21]

It all depends on whether the designer it's specifying plastic plug sockets or brushed stainless steel.

Good one

 

[mikeey84]

£33k and £110k ! (Both excluding kitchen)

I think the latter is more realistic than the former!

 

[Notch7]

£33k and £110k ! (Both excluding kitchen)

£80k to £100k would be my stab in the dark.

Youve basically got in round figures a 50sq m new extension and a 30 sq m garage conversion.

It is never ever gonna be a £30k job

 

[Steveb21]

Thanks both … gives me an idea at least.

 

[Steveb21]

£80k to £100k would be my stab in the dark.

Youve basically got in round figures a 50sq m new extension and a 30 sq m garage conversion.

It is never ever gonna be a £30k job

Excuse my ignorance however,

I have free labour resources for;

Digging foundations
Brick/Block laying
Plastering, skimming
Electrics
Plumbing
Preparing and installing the floor n(As already mentioned the garage has a concrete floor but will need to be built up with insulation etc. New area will have to be built up from hardcore).

As the majority of the walls are already up I have calculated my brick/block cost not to be much.
Bi fold door 4m I can get fitted for £3k
Roof lantern £3k
It is the cost to build up the flat roof where I will need to pay for the labour cost (have been quoted £5-6k)
Other building material costs.

Again, excuse my ignorance but out of the figure of £100k how much will be actual labour cost?

 

[HERTS P&D]

Where is the free labour from?

Andy

 

[Steveb21]

FAmily and friends. All professionals in their relevant area’s.

 

[Notch7]

Where is the free labour from?

Andy

'Free labour resource'.......sometimes referred to as 'wife'

 

[HERTS P&D]

If that's the case then get the plans and do a self build, getting the hired help when needed.

Andy