Building energy and thermal audit office
Starting costs about $39,100 in the United States and 6,930,000 NGN in Nigeria. After 12 months, this business can bring in about $4,580 net per month in the United States and 1,130,000 NGN in Nigeria. The starting money comes back in about 14 months, with 40 hours of work per week.
Mundyo estimates, data as of 2026-11-02.
See the numbers for my countryFree, no account, in the currency of 247 countries.
The numbers
| Country | To start | Net per month (month 12) |
|---|---|---|
| United States | $39,100 | $4,580 |
| Nigeria | 6,930,000 NGN | 1,130,000 NGN |
| United Kingdom | £26,700 | £3,170 |
| Kenya | 1,740,000 KES | 160,000 KES |
| India | 869,000 INR | 117,000 INR |
Amounts adjusted to each country's price and income levels.
The problem
Homeowners and businesses pay high energy bills without knowing which works pay off, and public grants often require a prior assessment.
The solution
On-site audits with a thermal camera, airtightness measurements and calculations, delivering a costed works plan ranked by return on investment.
Your customers
Homeowners, apartment buildings, small shops, offices, hotels and warehouses, plus contractors and estate agents who need assessments.
How you make money
250 to 600 € per home audit, 1,000 to 4,000 € for a commercial building, works supervision billed separately.
Competition
Established engineering firms, property inspectors, installers offering free audits to sell their works, and energy suppliers.
Who has an edge
A building engineer or technician independent from installers earns trust; clear teaching and readable reports beat standardised reports.
The risks
Certification required in many countries, dependence on changing public subsidies, costly equipment and professional liability for bad advice.
The first 3 steps
- Check which certifications are required locally to carry out audits
- Buy or rent a thermal camera and calculation software
- Carry out three discounted audits to build references
How the numbers are calculated
Example in a high-income eurozone country, at month 12: revenue €6,400 − costs €3,200 = €3,200 net per month. Revenue: 12 home audits × €400 + 1 commercial building × €1,600. Costs: thermal camera and software, certification, vehicle, insurance, social contributions. For other countries, Mundyo adjusts the starting budget to the price level (World Bank) and the income to prices and customers' purchasing power, then converts at the day's exchange rate.
Frequently asked questions
How much does it cost to start: Building energy audits?
About $39,100 (United States), 6,930,000 NGN (Nigeria), £26,700 (United Kingdom), depending on the country. Mundyo calculates the amount for 247 countries.
How much can you earn per month?
After 12 months, about $4,580 (United States), 1,130,000 NGN (Nigeria), £3,170 (United Kingdom) net per month, after costs.
How long until I get my starting money back?
About 14 months, with 40 hours of work per week.
What are the risks?
Certification required in many countries, dependence on changing public subsidies, costly equipment and professional liability for bad advice.
Where do I start?
1. Check which certifications are required locally to carry out audits 2. Buy or rent a thermal camera and calculation software 3. Carry out three discounted audits to build references
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