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(18 Posts)
elay5 Thu 23-Mar-17 10:58:56

Just got a quote for single storey extension thats 3.5m by 8.3 m, seems a bit outrageous at 36k would like people comments

Estimate Extension

To remove the decking 190
To remove the conservatory 590
To dig the foundation’s excavation -1m deep£2,590
To put the foundation concrete £890
To build the foundation wall £960
To put the DPC £190

To build the cavity walls£3,250
To install 2 lintels£190

To install metal beam £550
To install the roof joists £1,490
To put the celotex t insulation£430
To install 1 sky light window£360
To put the plywood £490
To put the roofing fibreglass mat£290
To apply the roof resin £450
To apply the resin top coat £280
Put the roof flashing £580
To install the fascia £310

Install the gutter £280


To remove the soil £550
To put base concrete floor £750
To put the Damp Proof Membrane £240
To put the Kingspan insulation £290
To put the top concrete floor £590

To install the external doors£190
To install 2 window £180
To install outside water tap£60
To put the ceiling plasterboards£340
To put the walls plasterboards £570

Ceilings plaster £590
Walls plaster £790
To install 2 doors£240
To paint 2 doors£200

To install 1 radiator£180
To paint the ceiling£260
To paint the walls £340
Laminate floor £390

Install 10 spotlights300
To install 2 lights £120
3 switches £140
4 sockets £200
To install new outside lig£60

Discount -£1,400
Total labour £20,530
Material and skip to supply
Material - about £12,000 - 14,000

namechangedtoday15 Thu 23-Mar-17 12:08:43

You're getting just less than 30 square metres with that size of an extension, and your quote is £36k (although you don't say whether thats with or without VAT).

Given that most people use £1500-£2000 per square metre plus VAT as an estimate (we've just done a 2 storey extension - which are supposed to be more cost efficient than a single storey - at the top end of those figures) I'd say its a bargain!!

whatsthecomingoverthehill Thu 23-Mar-17 12:40:25

Seems cheap, especially considering it includes decoration.

babydad Thu 23-Mar-17 14:28:15

that seems an absolute bargain. We have had quotes of £40k plus VAT with no 1st fix for a 4m x 2.5m extension (In London).

Feckerlino Thu 23-Mar-17 14:30:00

A friends extension was smaller and cost £55k. Sounds like a good price to me!

namechangedtoday15 Thu 23-Mar-17 15:28:06

Crikey, I hadn't seen that it included decoration too. My figures above were also to plaster finish and whilst labour is usually included for lights etc, I'm assuming you would buy and supply those yourself.

That sounds too good to be true. I'd want names of people he'd worked for before and I'd actually go and visit a couple of his former customers.

Cinderpi Thu 23-Mar-17 15:45:05

Where are you? I ran your job past my DH who's a builder and he reckoned about £10-15k labour (he's on a similar job at the moment, minus roof light but plus kitchen fitting and has quoted £12k).

elay5 Thu 23-Mar-17 16:09:43


Cinderpi Thu 23-Mar-17 16:24:55

We're in Cardiff, not sure how prices compare!

gleegeek Thu 23-Mar-17 19:23:49

Sounds very cheap to me (south east England) Our quote for fully finished 3.5mx3.5m single storey extension including fitting new kitchen and w/c has just arrived.... £86,000 plus vat! We were thinking £50,000 max...

Allthebestnamesareused Thu 23-Mar-17 19:27:30

Outrageously low do you mean?

SorryNotSorry Fri 24-Mar-17 21:13:43

Sounds pretty good.
Not nearly ready to start my extension but can you pm me the details as I am in Herts too

NamedyChangedy Fri 24-Mar-17 21:45:21

I'm nearby in North London and I'd be delighted if our extension came in at that amount. Our architect's prepared us for almost double that, plus VAT. Sigh.

Shadowboy Sat 25-Mar-17 08:29:13

Sounds like a bargain. Our 3x 5 m kitchen/dining area extension was £32k and that's with my husband working as a labourer every Friday to save money

KosmoKramer Sat 25-Mar-17 08:56:25

I'm currently having a 3m by 4m extension, plus garage conversion to utility room and downstairs loo. Includes velum window and French windows. £18,900 inclusive of VAT.

KosmoKramer Sat 25-Mar-17 08:56:52


sweetmelody Sat 25-Mar-17 10:38:04

Hi - I've pm'd you a request for your builders' details if you don't mind passing on. I'm in Herts too

elay5 Fri 31-Mar-17 14:01:12

Just to give another update, so I got another builder round to give a quote, for the same extension with a pitched roof, and two automatic velux windows his quote came in at 42500, and thats not fully furnished as I have another guy who was going to do interiors.

Right now wife and I have decided to delay the extension, will wait another six months and hopefully she will forget about it, lol

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