Hello all,

I would welcome suggestions for approximate durations for the completion of residential units in the UK (South).

Briefly the units for delivery are:

• 1 and 2 bedroom flats;
• 2, 3 and 4 bedroom detached and semi-detached respectively; and
• 1, 2 and 3 bedroom detached bungalows.

I have previously worked on the basis of 12 weeks 'fit out' per 2 bedroom flat with concrete frame, delivering four per week (in 'sets'), tested commissioned and signed off; with a two week lag between 'sets', adjusting accordingly for one or three bedroom units by +/- 1w. These will be low-rise (assumed 0-3 stories) but will that affect the output?

I would estimate a house of a traditional construction to be around 22-26 weeks in terrace, and perhaps closer to 30 weeks for detached units?? Based on the logic of 3w-5w substructure & drainage, 10w superstructure & envelope and maximum of 11w internal fit out per unit (externals completed in blocks/phases) with consecutive sequencing at this early stage. Please set me straight if that is absolute hot air!!

Also, I would expect that this could be accelerated using timber frame/modular construction.

Also appreciated would be some guidance on the infrastructure etc required for a large greenfield scheme (approx. 500 units in total) e.g. civils work, green space, street furniture etc. and associated duration estimates.

I am aware that with a scheme of this size, the sale of plots would affect the overall programme of the scheme i.e. while 500 units could be built in, say 5 years, this would not be the actual required build rate, however for the purposes of this exercise I am just trying to establish working time, as opposed to actual elapsed duration for the delivery of the entire scheme.

Any help or comments greatly appreciated, and thank you for taking the time to read this post.

Cheers,

Tom