Energy Certificates API

Energy Certificate Data Extraction, OCR for Energy Performance Certificates

Energy Performance Certificates (EPCs) are legally required documents that rate a building's energy efficiency, consumption, and environmental impact. They are used across Europe and the UK whenever a property is built, sold, or rented. Despite their standardised layout, EPCs vary by national register, building type, and issuing authority, making manual data entry slow and error-prone. ByteIt's extraction engine reads energy certificates as documents and returns structured data, energy labels, annual consumption figures, greenhouse gas (GHG) ratings, and metadata, ready for downstream systems.

11

Extractable fields

5

Use cases

7

FAQs answered

Benefits

Replace manual data entry from paper or scanned EPCs with automated extraction, reducing processing time from minutes to seconds.

Standardise data from different national EPC formats into a consistent, comparable structure for portfolio-wide analysis.

Eliminate transcription errors on critical numeric fields such as annual energy consumption and GHG emission values.

Accelerate property transactions, compliance checks, and energy audits by making certificate data available immediately via API.

How it works

  1. Step 1

    Upload

    Send the document to the API as a file or a URL no special formatting required.

  2. Step 2

    The engine reads the document

    The engine analyzes the page layout and identifies the content that matters. ByteIt's engine reads the energy certificate's layout, identifying the energy label, consumption figures, and GHG data by their visual position and context rather than relying on fixed template coordinates.

  3. Step 3

    Structured JSON is returned

    Every extracted element comes back as structured JSON, positioned and typed, ready to feed into downstream systems.

  4. Step 4

    Confidence-based review

    Each field carries a confidence score, so low-confidence results can be routed for human review instead of trusted blindly.

Extractable fields

Energy label (A–G rating)Annual primary energy consumption (kWh/m²·year)Annual final energy consumption (kWh/m²·year)Greenhouse gas (GHG) emission value (kg CO₂e/m²·year)GHG emission class ratingEnvironmental impact dataDocument typeCountry of originLanguage on the certificateImage quality+ many more

Features

Extracts energy label ratings (A–G), annual primary and final energy consumption, and GHG emission data.

Captures document-level metadata: document type, country of origin, language on the certificate, and image quality indicators.

Handles multi-page certificates, scanned documents, and photographs of printed EPCs in a single API call.

Outputs structured data in JSON, CSV, or Markdown via REST API or ByteIt Studio, with no template configuration required.

Routes each document through an orchestrated extraction layer that adapts to varied certificate layouts and regional formats.

Use cases

Real estate portfolio energy compliance

Property management firms and housing associations process thousands of EPCs across their portfolios to meet minimum energy efficiency standards (e.g. MEES in the UK). ByteIt extracts the energy label and consumption data from each certificate so that compliance status can be checked, flagged, and reported automatically without opening every PDF.

Property listing and transaction automation

Estate agents and conveyancers need the EPC energy rating and certificate reference number before a property can be listed or sold. By extracting these fields on upload, agents can auto-populate listing portals, reduce back-and-forth with clients, and close transactions faster.

Energy audit and retrofit analysis

Energy consultants conducting large-scale audits require consistent, machine-readable data from certificates to compare buildings, identify the worst performers, and recommend retrofit measures. ByteIt's structured output (JSON/CSV) feeds directly into analysis tools and reporting dashboards.

Green finance and ESG reporting

Banks and financial institutions assessing the energy performance of real estate assets for green mortgages or sustainability-linked loans need verifiable EPC data. Extracted fields such as energy label and GHG emissions can be integrated into underwriting workflows and ESG scoring models.

ERP and workflow system integration

Connect the extracted EPC data to your property management system, CRM, or accounting software using workflow automation tools like n8n, Zapier, or Make. No manual re-keying, no CSV exports, the data moves straight from the certificate into your existing processes.

LIVE DEMO

Try it yourself

Upload a sample energy certificate or test with one of our pre-loaded documents to see extraction results instantly. Accepts PDF, JPG, and PNG formats.

Sample document: ENERGY PERFORMANCE CERTIFICATE

Select a document and press Parse

Want to run it on your own documents?

Ready to dive in? Request a key to get started.

Business advantages

Frequently asked questions

What file formats are supported for energy certificates?

ByteIt accepts PDF, JPG, JPEG, PNG, Word (.docx), and Excel (.xlsx) files. Scanned paper certificates and photographs of printed EPCs are also supported.

Does the engine handle EPCs from different countries?

Yes. ByteIt's layout-aware extraction adapts to EPC formats from the UK, EU member states, and other regions. Country of origin and language on the certificate are extracted as part of the output.

Can it extract data from poor-quality scans or photos?

The engine is trained on real-world document conditions, including low-resolution scans, skewed angles, and photographs of printed certificates. Image quality is reported in the output so you can flag documents that may need re-scanning.

How do I integrate energy certificate extraction into my workflow?

ByteIt provides a REST API and a Python SDK. You can also use ByteIt Studio to preview extraction before writing code, or connect the output to your systems via workflow tools such as n8n, Zapier, or Make.

How is the data returned after extraction?

Data is returned as structured JSON with extracted fields and their values. CSV and Markdown export options are also available through the platform.

Does the API handle multi-page energy certificates?

Yes. ByteIt processes multi-page documents and returns all extracted fields aggregated into a single structured output per document.

What kind of accuracy can I expect?

Accuracy depends on the quality and consistency of the source document. ByteIt's orchestrated extraction layer uses vision-language models optimised for document layout, which typically achieves higher precision than general-purpose LLMs on structured fields like energy labels and numeric consumption data.

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