building quote and costs dublin 2010

codublin

Hi,

Can anyone give me an approximate cost for the following.
Own a semi-detached 1950's house with side lane access in south dublin.

Wanting to add 90m2 side extension 40m2 of which is ground and 50m2 above including overhang on side passage. Also 55m2 single storey ext on rear of house. Some structural beam work to allow rooms to be opened out.
Also revamp, insulate and new concrete floors to 1950's house. Ground floor is approx 54m2 and same above on first floor so 108m2.
New heating system and new double glazed windows.

Whats the average cost now in Dublin post celtic tiger for such a job. Expected duration 4-6 months. Statring in March 2010.

Cheers
CoDublin

mr_edge_to_you

hi there,

sounds like a fairly big project. i'm coming to the end of a full build as opposed to a renovation but it looks like we'll be hitting 140e per sq ft. we are only a few miles from the m50 so pretty close to dublin.

there are few things which are going to impact significantly on your project cost. what type of windows are you going to put it in? the range of stuff out there is quite amazing. there is an array of different products and totally different prices available - pvc, aluclad, timber etc. pvc is probably 50% cheaper than aluclad so these issues really are cost drivers in yout project.

likewise with your choice of heating system. are you just going to replace the basics of what is there or are you going to put in something radically new. i've heard of people going with vertical geo-thermal in city locations if they have a bit of space available. are you going to install solar panels? are you going to put in ufh?

all these issues are going to determine the cost - you are looking at thousands of euros here with these two issues alone. the block work is probably going to be the cheapest part. it's the quality of the finish you want which will decide the cost. i'd say could start working off the magic number of 100e per sq ft but the best way of finding out is to get the spec out there and get a few quotes. you have a lot going on there and it is quite difficult to put a value on it.

justflow1983

Also, just to point out, you should with your designer to decide a lot of these things. A good designer should be able to give you educated opinions on how to insulate without getting condensation problems etc. As a general example timber frame can be more expensive, but it is warmer and the walls are not as thick because the insulation is between the studs. But in that case, they will have to know where the vapour retarding membrane needs to go to avoid having mould issues down the road. Be sure to work with an experienced, well rounded designer to make the process as painless as possible. Their fees may seem high, but if they're doing their job right it will save you countless hours of time and headaches. A good QS might even be very valuable in controlling your costs.

paddy147

Put the project out to tender.

That way you will see the varying prices from different builders.

Then pick 5-8 builders and interview them and look at their work and references.