Construction estimating software UK: what to look for

It needs to think in UK stock lengths, not metres

A lot of estimating software — particularly US-built tools re-skinned for the UK market — measures timber and steel in continuous linear metres. That's fine for a takeoff on paper, but useless the moment you go to order. You buy timber in 2.4m, 3.0m, 3.6m and 4.8m stock lengths, not in whatever number the software spits out. Good UK estimating software rounds every linear item up to a buildable stock length and tells you how many lengths to order, not just how many metres you need.

It should follow NRM2 cost structure

NRM2 (RICS New Rules of Measurement 2) is the standard most UK quantity surveyors and commercial clients expect costs to be grouped by — substructure, superstructure, internal finishes, services, external works, and so on. You don't need to be a QS to benefit from this structure: it forces you to price every section of the job rather than lump everything into one list, and it makes your quote instantly recognisable to any client who has dealt with a QS before. Estimating software that just gives you one long flat list of items is harder to check and looks less professional.

VAT has to be handled properly, not bolted on

Most residential work is standard-rated at 20% VAT, but certain works — new-build residential construction, some conversions, and qualifying energy-saving materials — can be zero-rated or reduced-rated. Software that only lets you add a flat 20% on top of every quote will either overcharge your client or leave you exposed if HMRC ever queries the treatment. Look for software that lets you set VAT treatment per quote, shows the VAT breakdown clearly to the client, and keeps a record of which rate you applied and why.

CIS deductions shouldn't be a spreadsheet you keep separately

If you're a contractor engaging subcontractors under the Construction Industry Scheme, you're responsible for verifying their CIS status and deducting the right percentage (typically 20% for verified subcontractors, 30% if unverified) from labour payments before passing the rest to HMRC. If you invoice as a subcontractor, your own customer may need to deduct CIS from you. Estimating and invoicing software aimed at UK builders should let you flag labour lines as CIS-applicable and calculate the deduction automatically, rather than leaving you to work it out by hand every time.

Live merchant prices beat a static price book

A price book you update once a quarter is already out of date the day you load it — timber and steel prices in particular can move significantly month to month. Software that lets you import current merchant price lists (or send RFQs and pull prices back in) keeps your margins honest. If the tool can't take a CSV export from your usual merchant account, you'll end up re-keying prices by hand, which defeats a lot of the time saving.

It should take you from takeoff to invoice, not just to a quote

A lot of "estimating" software stops at the quote. But the quote is only the start — once it's accepted you still need to order materials, track what's been delivered, and invoice in stages as the job progresses. Software that connects the takeoff, the quote, the supplier RFQs and the invoicing means you're not re-entering the same quantities three times in three different tools.

Questions worth asking before you sign up

• Does it round timber, board and roll quantities to real stock sizes?
• Can you set VAT treatment per quote, and does it show the breakdown?
• Does it handle CIS deductions on labour, or do you still need a spreadsheet?
• Can you import supplier price lists, or send RFQs from within the tool?
• Does the same data flow through to invoicing, or do you re-key it?
• Is there a free trial you can run against a real job before you pay?