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Thread: Getting a builder to build a garden office - any idea on costs please

  1. #1
    Craftsman
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    Getting a builder to build a garden office - any idea on costs please

    Am looking at getting a home-office built at the top of the garden. Iíve had a look at some local pre-fab units but these are coming in at around £12k+ (more with groundwork + cedar + extras) and Iím guessing that finding a competent builder locally could reduce the cost by a fair chunk.

    This is what Iím looking for:
    ē 5m x 3.6m wooden structure with overhang roof
    ē Patio door and corner window
    ē Cedar cladding on exterior (not at the rear as this won't be visible)
    ē Plastered walls and ceiling
    ē Electrics
    ē Groundwork

    Something not a million miles away from this I suppose - https://www.moderngardenrooms.com/su...e-canopy-room/

    Any idea what costs would likely be for this please based on:
    ē Timber
    ē Cedar cladding (sides and front only)
    ē Patio door and single window
    ē Insulation
    ē Roofing
    ē Misc - paint / lights / sockets / flooring
    ē Labour: groundwork / build / electrics / plastering

  2. #2
    Master Franco's Avatar
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    There has been a good thread here:

    https://forum.tz-uk.com/showthread.p...=garden+office

  3. #3
    Master
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    10 years ago I paid £20k ish including installation but not groundworks for a 9m x 6m wooden garage, lined internally with 20mm marine ply with insulation behind. £3ish of the price was cedar shingles on the roof but the cladding is only softwood.

    Add 1k or thereabouts for electrics.

    I'm not sure you could have a wooden building plastered, it will move too much and crack the plaster, dry lining is the best you'll get.

    Have all four walls in cedar or you'll curse yourself when you are slapping preservative on one wall every three to four years.

  4. #4
    Craftsman
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    I would expect to pay in the region of 20k for a flat roof cabin of those dimensions. This is based a construction of substantial materials and not the thin wood often found on the off-the-shelf variety, along with full wall and floor insulation, electrics and UPVC windows.

  5. #5
    I was quoted £41k for a 6m x5m cedar garden room from one of the big players. This excluded electrics running to it.

    I then asked a good carpenter to quote for the same and he came in at £11k plus the bifold plus the base. It was likely to be c.£20k via that route so around half price.

  6. #6
    My company has built these two. Budget around £15-20k. The bottom one is my office and measures 3x5m excluding the decking.




  7. #7
    Master thieuster's Avatar
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    Wow! Nice outbuildings on those pictures! A lot nicer than the newly-built-old-fashioned ones we see here in back-gardens...

    Just thinking: when you use this as an office in the summer, doesn't it get very hot? In other words: do you need an airco for that?

  8. #8
    Quote Originally Posted by thieuster View Post
    Wow! Nice outbuildings on those pictures! A lot nicer than the newly-built-old-fashioned ones we see here in back-gardens...

    Just thinking: when you use this as an office in the summer, doesn't it get very hot? In other words: do you need an airco for that?
    Iíve got a dunster house one I built myself a few years ago. Itís fine in summer with the doors open. I did put extra insulation in the roof which I think keeps it cooler in summer as well as warmer in winter. When itís really hot a fan is a help! Also electric underfoor heating was definitely worth it for cold days like now.

  9. #9
    For the OP, approaching 20k is about right for a fully finished job Iíd say.

  10. #10
    Quote Originally Posted by thieuster View Post
    Just thinking: when you use this as an office in the summer, doesn't it get very hot? In other words: do you need an airco for that?
    This summer was the first Iíve used mine and it did get very hot, itís well insulated but thereís a lot of glass and a huge sky light.

    Iíve applied reflective film to the glass which helps a good amount. Itís also less bright and more private. A Dyson fan cooled a bit too but I may get an aircon unit next year.

  11. #11
    An air con unit is essential. My office went over 30C in the summer when the air con PCB broke.

  12. #12
    Craftsman
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    Although not a home office a few shots of my garden Room I had a builder do.
    This was three years in the planning and a lot of thought went in so my thoughts.
    I looked at every option on the market from insulated log cabins from the likes of dunster house to to composite insulated panels and also one built of SIPS.
    In the end I went for a traditional timber build, we'll insulated including the use of cedral cladding which is more or less maintenance free.
    I ended up with a building that is warm with minimal heating and can be used all year round.

    But believe me for something right of good quality there is no cheap options!!!



    Sent from my GM1913 using Tapatalk

  13. #13
    Master yumma's Avatar
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    We built a 30sq.m Pilates Studio around 3 years ago, it was bespoke built to a good spec, it cost £15k, weíve added A/C and underfloor heating this year at a further £5k.

  14. #14
    Craftsman
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    Thanks for all the advice people.

    A local place does what Iím after for about £15k so maybe that isnít too bad a price. I was thinking I could get it done for about £8k but think Iím living in cloud cuckoo land !!!

  15. #15
    Master
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    A decent garden building will be £20K plus.
    My summerhouse was a Dunster House thing. Not a patch on the quality of the one in my old house but it's ok and cost about £3K up and built. It's cold in the winter - I bought a £20 heater. It's hot in the summer - I bought a £20 fan.
    Works for me.

  16. #16
    Apprentice
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    Timber Garden Office

    Hi

    Previous neighbour had a Finnforest cabin put up in 3 days, concrete raft base, including electircs from house to bottom of garden. Based on Scandinavian design so allows for harsh cold, variety of sizes/looks to suit.

    Link: http://www.cabinliving.co.uk/range.asp?range=Finnforest

    If I hadnt gone for traditional cavity wall construction/pitched slate roof I would have had a Finnforest cabin.

    L-K

  17. #17
    Quote Originally Posted by Low-Key View Post
    Hi

    Previous neighbour had a Finnforest cabin put up in 3 days, concrete raft base, including electircs from house to bottom of garden. Based on Scandinavian design so allows for harsh cold, variety of sizes/looks to suit.

    Link: http://www.cabinliving.co.uk/range.asp?range=Finnforest

    If I hadnt gone for traditional cavity wall construction/pitched slate roof I would have had a Finnforest cabin.

    L-K
    Iíve been looking at buying similar but to my mind a Ďlog cabiní is made of logs, not planks!

  18. #18
    Craftsman
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    My neighbour just built one for me. Platform was about 5x4m and he reckons cost £1k, then he did the 4x3m shed for £4k. Got a fibreglass flat roof with a big skylight etc. I was shocked at the price but going by this maybe itís pretty good!


    Sent from my iPhone using TZ-UK mobile app

  19. #19
    Craftsman
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    Quote Originally Posted by greenandblack View Post
    My neighbour just built one for me. Platform was about 5x4m and he reckons cost £1k, then he did the 4x3m shed for £4k. Got a fibreglass flat roof with a big skylight etc. I was shocked at the price but going by this maybe itís pretty good!


    Sent from my iPhone using TZ-UK mobile app
    Thatís a bargain I think.

    A local place near me does a 3m x 2.4 for £5k and youíre is much larger.

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