I would slightly disagree with comments above. I'm coming to the end of a renovation project that has taken 3 years from concept to reality. We initially contacted a local building contractor who put us in contact with his recommended architect. We all sat down together and worked out a design/plan and budget for our renovations. If you don't consult a contractor at the beginning you could find the beautiful architects drawings you have - and have planning permission for, are completely unaffordable! I agree at the design stage a contractor will not be able to give you detailed costs - but they can at least advise what design elements would come within your budget. Also we found good reputable builders can be booked up anything up to a year in advance - so yes if you want to start next spring you need to get started with plans/budgets etc. As for moving out - that would depend on the existing and new layout of your house - and if the building work can be done in stages minimising disruption to your living accommodation. With our project we were left with no choice really but to move out. For us it's made for a much less stressful process and probably a considerably quicker build time. Most of all good luck with your project. I've enjoyed our ours so try to enjoy the process!

Hi Heidi, Having just done such a project (and learnt a little from it...): Ceiling heights: minimum thickness of a floor is around 200mm/8" but some of that can be "reclaimed" below e.g. by leaving the joists exposed. Above is trickier because insulation requirements for the roof mean you can't really do that much there; the distance between the outer surface of the roof ridge and the inner ceiling will end up at least 250mm. Do your figures. Regarding the steelwork, there are lots of technical options to build this and "all of them may be right" as in (not) needing a ridge steel beam. Have you got an SE (structural engineer) spec for it? You can talk directly to steelworks fabricators about this. Builders tend to buy RSJs from specialist companies whose business it is to "sell steel made to size / spec" - steelworks fabricators. Some builders like to "cut&weld on site" because it saves them time but workshop welding and steel preparation tends to have more consistent quality and is preferred by structural engineers and/or insurance & building control (the latter often because of the fire risk for welding work on small sites). So this may be a case for more questions to the builder ("who's your steel fabricator and would you mind me talking to them?"), or a 2nd opinion by showing the plans to a fabricator and asking them for how they think this could/should best be built. The technical term is to request a "method statement" - how will the steelwork be made to conform to design, comply with structural spec & building regs and/or constraints of property deeds, and how will it be installed (to satisfy site insurance and Health& Safety regs, and/or other provisions e.g. from party wall awards/consents) ?" On the fire suppression system: building regs part B (fire safety, https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/485420/BR_PDF_AD_B1_2013.pdf ) extensively talk about "means of escape" which usually are protected / made "safe" by the additional fire resistance hallway walls and fire-rated doors to the hallway/stairwell provide. Where you have open-plan, the guidance says (quote): "Alternatively, it may be possible to provide sprinkler protection to the open-plan area, [ ... long sequence of auxiliary requirements/explanations ... ]" And the devil is in the detail. Not the least because "sprinkler" isn't the same as "mist sprinkler" (let's not go there now, rabbit hole...). It's definitely worth pre-clearing the design / fire suppression method with building control, because once you start, having to "alter" later to put extra partitions in not only blows costs out but also kills the design. From my own experience - do not let the builder "just start" because ... they may hold _you_ to ransom if their (hidden) cost-saving provisions are felled by external agents/influences. With no roof on the building and neighbours breathing down your neck for potential damage or perceived risk, or building control refusing signoff unless major changes, you're in a pretty bad negotiation position. Building regs will pre-clear designs for you, possibly for a small fee. Good luck !

Just wondering, if we went back to the picture with the original design with a bedroom, bathroom and study area in the loft. Options one is bathroom under the eaves. The architect has suggested running the soil pipe down the outside of the building which I think a) would look ugly and b) would need extensive and expensive groundworks to join to main drains. I wound have thought running under the floorboards to join existing soil pipe behind the loo in the bathroom would make more sense? Option two is moving bathroom to the back by the window, into the study area. I was initially against this as it seemed to make more sense to enjoy the view with a bedroom/ study but I’m now wondering if this is actually the most sensible? If so I’m wondering about the layout for the dressing area/ reading nook/study area and if anyone has any good ideas? Thanks in advance for your help!

This looks like a lovely sized room. I’m sure this layout would work well but do you really need a bath in there? I would suggest a really fabulous shower and use any room saved for additional storage ( Your plumber could even run a hot water pipe from the central heating system through a tall cupboard which will keep your towels snuggly and warm). I would leave the loo where it is. then put the cupboard and double vanities where the bath is (60cm cupboard and 120 double vanity) and a long walk-in shower along the wall where you currently have the sink. One little addition which I have in my bathroom is a motion activated light situated low down near the loo (mine is actually underneath a wall hung loo). At night any bathroom trips have a little bit of ambient light to get you where you need to be without a glaring main light to wake you up. Good luck with your project. Im sure it will be fabulous