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Business Phone Numbers for Builders & Construction Firms

New enquiries to the office, existing jobs to the site manager, and one number that stays with the business

The phone rings most when you are busiest

A builder's phone does several jobs at once. New customers ring about extensions, current customers ring about the kitchen that was meant to be finished on Friday, suppliers ring about deliveries, and subcontractors ring about tomorrow. On a noisy site with a cement mixer going, plenty of those calls are missed.

Industry research has put a number on it. In a 2016 survey of UK small businesses, 41% of building contractors did not answer the phone when a potential customer called. SwitchboardFREE puts one professional number on the boards, the vans and the website, and gets each call to someone who can deal with it.

Site manager in a hard hat taking a call on a house extension site

What a building firm gets

  • One number for the whole business: a local 01 or 02 number for the boards, vans and website, answered on mobiles, desk phones or both
  • Calls sorted before anyone answers: "press 1 for a new project, press 2 about a current job" with departments on the Standard and Unlimited plans
  • Office and site on one system: a desk phone in the office and the SwitchboardFREE app for site managers, with free internal calls between them
  • Calls that roll over: if the office is busy, the call rings the site manager next, then goes to voicemail
  • Voicemail to email with transcripts: new enquiries arrive as text, ready to forward to whoever prices the job
From £5 per user/month + VAT

Choose the number for your boards and vans

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New enquiries, current jobs and suppliers on separate routes

A short menu on your business number sends each caller to the person who can help, without anyone transferring calls by hand:

  • New projects and quotes ring the office, or the director pricing work, first
  • Existing jobs ring the site manager for that customer's project
  • Suppliers and deliveries go to whoever handles orders, and away from the person on the scaffold
  • After hours, callers hear your open and close times message and can leave a voicemail

Each option can ring one person, several people at once, or a list of people in order. Changes take effect straight away from the app or your online account.

Customers stay with the business when people move on

If customers have your site manager's personal mobile, they follow the site manager. When the business number is the one on the paperwork and the boards, and every call back is made from the app showing that number, the customer relationship stays with the firm. When someone leaves, you take them off the account and the number carries on ringing.

Fewer calls from people you do not want to hear from

Building firms get more than their share of lead sellers, directory sales and cold calls. Add known nuisance numbers to your contact book to bar them, and set your favourite customers and suppliers to come straight through. Unlimited plans include the nuisance call blocker as standard.

Talk to us about your building firm

Tell us who answers the phone now, in the office and on site. We will suggest a setup that gets each call to the right person.

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Record what was agreed

Variations are where builders lose money. A customer asks for an extra socket or a different tile on the phone, and three weeks later remembers it differently. The call recording add-on keeps a copy of the call, so you can go back to exactly what was agreed.

Keep the number you already have

You can move your existing business number to SwitchboardFREE for free, usually within 7 to 14 days. If it is still on a copper line at the yard, it has to move before the old network finishes switching off on 31 January 2027.

Feature by feature: why SwitchboardFREE works for builders and construction firms

Every SwitchboardFREE account comes with over 40 features. These are the ones that make the biggest difference to builders and construction firms, and why.

DepartmentsStandard & Unlimited plans
New customers asking about extensions, current customers chasing a kitchen and suppliers confirming deliveries all ring the same number. A menu such as "press 1 for a new project, press 2 about a current job, press 3 for suppliers" sends each caller to the office, the site manager or whoever handles orders, each with its own voicemail.
Divert calls to your mobile
Site managers spend the day on site, not at a desk. Calls to the business number ring the SwitchboardFREE app on their mobile, a softphone or a desk phone, so a customer asking about tomorrow's start reaches the person running the job.
Ring groups
When the office is busy, a call about a new extension should not ring out. Ring the office first and then the site manager and the director in order, or ring several phones at once so whoever is free answers.
VoIP desk phones
The office that prices jobs and orders materials needs proper phones, while the site team works from mobiles. VoIP desk phones plug into the office broadband and arrive set up, on the same system as the app on the site managers' phones.
Call transfers
A customer rings the office about a snag that only the site manager can answer. Transfer the call to site, blind or after a quick word first, and the office and site call each other free on internal calls.
Call recordingPaid add-on
Variations are where builders lose money: a customer asks for an extra socket or a different tile on the phone and remembers it differently three weeks later. Call recording keeps a copy of all or some calls to play back or download, so you can check exactly what was agreed.
Voicemail to email
A new enquiry left as a voicemail while the cement mixer is running is easy to lose. Voicemails arrive by email with a written transcript, ready to forward to whoever prices the job.
Calls from your business number
If customers have your site manager's personal mobile, they follow the site manager when they leave. Calls made from the app show the business number, so the customer relationship stays with the firm and personal mobiles stay private.
Contact book
Building firms get more than their share of lead sellers, directory sales and cold calls. Bar known nuisance numbers in your contact book and set your best customers and suppliers as favourites, and choose Unlimited if you want the nuisance call blocker included rather than paying for it separately.
Missed call alerts
On a noisy site, plenty of calls go unheard. The caller's number is emailed the moment a call is missed, so you can ring a homeowner asking about an extension back before they try another builder.
Music on holdStandard & Unlimited plans
When the office puts a customer or supplier on hold to check the programme or a delivery date, silence sounds like a dropped call. Music on hold keeps them on the line while you find the answer.
Open and close times
Customers ringing about their job at 9pm do not need to reach the site manager at home. Set your business hours, and outside them callers hear your out-of-hours message and can leave a voicemail for the morning.

Questions builders ask us

Yes. One number can ring a desk phone in the office and the SwitchboardFREE app on site managers' mobiles, at once or in order. You can also add a menu so callers choose between new enquiries and existing jobs.

Yes. Customers ring the business number, and when you call them back from the app they see the business number too. You can close the lines in the evenings so calls go to voicemail.

Nothing changes for your customers. The number belongs to the business, so you remove that person from your account and calls ring whoever replaces them.

Yes, with the call recording add-on. It keeps a copy of calls so you can check what was agreed about prices, dates and changes to the job.

No. Plans are rolling monthly with no setup fee, from £5 per user per month plus VAT, and you can add users and numbers as the firm grows.

Related trades

Built for builders

Win the next job while you finish this one

From £5 per user/month + VAT

No contracts. No setup fees. Office and site on one number.

Or call 0203 189 1213

SwitchboardFREE app for builders & construction
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