BER Estimator
Home Energy Rating Calculator
Only for iPhone
$0.99 · Designed for iPhone. Not verified for macOS.
iPhone
Estimate your home's BER rating in minutes. Private, independent, no upselling — just honest energy maths for Irish homeowners.
What's your Irish home really costing you?
BER Estimator gives you a quick, private estimate of your home's Building Energy Rating — no assessor visit, no sales calls, no strings attached.
Answer a few simple questions about your home — type, age, walls, roof, windows, heating — and get an estimated BER rating from A1 to G, with your approximate annual energy cost and practical suggestions for improvement.
SIMPLE AND HONEST
Big, clear controls. Plain English. No jargon. Every question includes a sensible default, and if you don't know something, just say so — the app will make a reasonable assumption based on your home's age and type.
PRIVATE BY DESIGN
All data stays on your device. Nothing is uploaded, transmitted, or shared. No accounts. No analytics. No tracking. Your home is your business.
COMPLETELY INDEPENDENT
BER Estimator is not tied to any energy company, retrofit supplier, assessor service, or government body. There are no affiliate links, no partner referrals, and no lead generation. Nobody is trying to sell you anything.
WHAT YOU GET
• An estimated BER rating from A1 to G
• Your approximate energy use in kWh/m²/yr
• An estimated annual energy cost based on current fuel prices
• A breakdown showing where your energy goes — heating, hot water, lighting, ventilation
• The top three improvements you could make, ranked by impact, with rough cost bands
• A shareable plain-text summary of your results
WHAT IT'S BASED ON
The calculation uses a simplified version of Ireland's Dwelling Energy Assessment Procedure (DEAP), the same methodology used by registered BER assessors. Default U-values come from Irish Building Regulations Technical Guidance Document L across all revision periods from pre-1978 to 2020+.
WHAT IT ISN'T
This is an estimation tool, not an official BER certificate. For a legally valid BER for property sale, rental, or grant applications, you need a registered assessor — visit seai.ie/ber to find one.
BER Estimator exists to give you an honest starting point before you spend money. Whether you're thinking about retrofit, curious about your home's efficiency, or just want to understand where your heating bill goes, this app gives you a clear answer in under five minutes.
One payment. No ads. No subscriptions. No nonsense.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Stuart Woolley, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Stuart Woolley
- Size
- 2.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.4 or later.
- iPhone
Requires iOS 26.4 or later. - Mac
Requires macOS 26.4 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.4 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Stuart Woolley
