Building consultant for small developers

Guide small developers and landlords through budgets, contractors and compliance on larger building projects, on site and in meetings.

A consultant reviewing building plans and documents with a construction site behind.
Startup cost£1.5k to £8k
Monthly revenue£2.5k to £10k
Time needed30+ h/week
First incomeMonths
  • £1.5k-8k
  • Full-time
  • Out and about

Estimates for a small start in the UK, not guarantees.

Official data

38,095 UK companies in this field, 28% registered in the last 2 years

SIC 71129 “Other engineering activities”. Source: Companies House, November 2026.

What it is

A full-time consultancy supporting small developers, landlords and property investors on bigger projects such as conversions, new builds and refurbishments. You review budgets, check contractor quotes, monitor progress and flag compliance issues.

Your first three steps

  1. Choose the project types you know best and write a one-page service list with clear fees
  2. Arrange professional indemnity and public liability insurance and set up a sole trader or limited company
  3. Reach out to local developers, letting agents and solicitors, and offer a paid budget and contractor check on a live project
Who pays

Small property developers, landlords, investors and businesses managing building work.

How it makes money

Monthly retainers, day rates or fixed fees per project stage, often with repeat work from the same clients.

Skills that help
  • Strong construction or project management background
  • Cost estimating and contract knowledge
  • Confident negotiating with contractors
  • Good record keeping and reporting
Watch out for
  • Professional indemnity insurance is especially important on larger projects; check the cover level clients expect
  • Make sure contracts set out your responsibilities and limits, and take legal advice on your terms
  • Check whether any of the work requires specific qualifications or registration, such as for design or health and safety roles
  • Clients can be slow to pay, so agree payment terms and consider staged invoices
  • A few big clients can mean uneven income if one project ends

🔒 Full research report for UK

Real cost breakdown with current prices, licences and registration checklist, local competition, pricing, break-even and a 30-day launch plan, with sources.

Coming soon

Questions people ask

How much does it cost to start a building consultancy in the UK?

Startup costs are typically around £1,500 to £8,000, depending on your equipment, insurance level and how you set up. These are estimates. Remember to budget for professional indemnity cover and legal advice on your contract terms.

How much can a building consultant earn?

Monthly revenue is typically around £2,500 to £10,000, depending on the number and size of the projects you take on. Relying on a few big clients can make income uneven if one project ends, so treat these as estimates.

What insurance or qualifications do building consultants need?

Check what level of professional indemnity insurance clients expect, especially on larger projects. Also check whether any of your work needs specific qualifications or registration, such as design or health and safety roles, and make sure contracts set out your responsibilities and limits.

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