Build Cost

HARSA

Based on a £1000 per sq meter build cost how much will it cost to build another floor on top of the Bungalow?By my calculations it’s 360qq m* £1000 = 360K which seems very excessive. I want to extend put a 2nd floor on top covering the existing bungalow floor space This is the existing spaceLounge 5.5m (18 feet) x 4.5m(14.9 feet)Dining Kitchen 5.5m(18 feet) x 3.8m(12.5 feet)Bedroom One 4.5m(14.9 feet) x 3.4m(11 feet)Bedroom Two 3.3m(10.9feet) x 2.5m(8.2 feet)Bathroom 2.5m(8.2 feet) x 2.7m(8.10 feet)Many thanks

Johnandabby

Using those areas I calculated 76 sq m so not sure where the 360 sq m comes from - possibly 85 sq m with corridors?

HARSA

Johnandabby wrote: »

Using those areas I calculated 76 sq m so not sure where the 360 sq m comes from - possibly 85 sq m with corridors?

Thanks John

Do you mind telling me how you worked it out? I added all the meters together which gave me approximately 24m * 19 = 360sq m

As suspected that is wrong.

I want to turn the footprint of the conservatory (2.6m *10.8m) at the back of the property into a single storey extension.

Can you please tell me what the sq meter is and likely cost of the extension?

Many thanks John

Waterlily24

Hi HARSA here are the calculations.

5.5m x 4.5m = 24.75 sq m
5.5m x 3.8m = 20.90 sq m
4.5m x 3.4m = 15.30 sq m
3.3m x 2.5m = 8.25 sq m
2.5m x 2.7m = 6.75 sq m
TOTAL = 75.95 sq m

Don't know if this is clear but you add up the square metres for each room to get the total.

Hope this helps

sonastin

Waterlily's method is one way to work it out - work out the area of each room and then add the areas together.

The other option is to work out the length of the house and the width (by adding together the length of all the rooms along one wall (e.g. front), and the width of the rooms on the perpendicular wall (i.e. one side). Assuming the house is square/rectangular, you multiply them together.

It sounds like you added the length of all walls i.e. rooms front and back were both counted so increased the area? If the house isn't a simple shape, Waterlily's method is more straight forward.

Where did you get the £1000 per sq.m from? Sounds like a lot to me. Are you planning to remove the roof and build another storey so its a whole house 2 storey house with loft or are you talking about a loft conversion?

I_have_spoken

It's unlikely a bungalow will have the foundations for a 2nd story to be added which satisfies Building Control.

clockworks_2

Rather than add a floor I converted the loft in my bungalow. If you want to add a floor you can use a timber extension as opposed to bricks which is lighter and may avoid underpinning .

Gwhiz

Typical advertised build costs would include foundations etc.

I doubt adding another floor would be £1000/sqm.

Waterlily24

We had trouble getting permission to build a second floor on our bungalow. It's a long story, we actually wanted to extend and keep it as a bungalow but weren't allowed to do it as big as we wanted. We then put in plans for a chalet bungalow but were told that the roof was too high. We eventually got planning permission for the chalet bungalow and an extension at ground floor level.

The original bungalow was L shaped so it had to be squared off and another extension on the other side, we weren't allowed to keep this part of the extension in line with the other walls, it had to go about a foot in each side. Not sure if this makes sense but they certainly didn't make it easy lol.

There were no objections from neighbours, we live in a rural area with no really near neighbours and have a very large garden.

We do come under countryside so not sure if that makes much difference.

We also had to have the bungalow underpinned.

I also agree with sonastin that it's probably much easier to do the outside measurements if the building is square or rectangular.

lincroft1710

It is very rare to extend a bungalow by removing the roof and building directly on top of the existing brickwork. The more usual method is to put rooms into the existing roof space and creating dormers, or more radically, demolishing the existing bungalow and starting completely anew.

HARSA

Waterlily24 wrote: »

Hi HARSA here are the calculations.

5.5m x 4.5m = 24.75 sq m
5.5m x 3.8m = 20.90 sq m
4.5m x 3.4m = 15.30 sq m
3.3m x 2.5m = 8.25 sq m
2.5m x 2.7m = 6.75 sq m
TOTAL = 75.95 sq m

Don't know if this is clear but you add up the square metres for each room to get the total.

Hope this helps

Thanks very much.

I added all the ones on the left and added the ones on the right and times that . Which was clearly wrong