Energy Performance Certificate (EPC)
Accredited domestic energy assessment
A legally required certificate rating the energy efficiency of your property. Valid for 10 years. Lodged on the official register the same day.
- Domestic EPC by accredited assessor
- Same-day lodgement to the EPC register
- Digital copy delivered within 24 hours
- Out-of-hours appointments available
What does a domestic EPC assessment include?
A domestic EPC assessment records a home's construction, insulation, heating, hot water and lighting to calculate an energy rating from A to G. AG Site Solutions provides assessments for existing homes from its Slough base across London and the South East.
- What you receive
- An Energy Performance Certificate lodged on the official register, with an energy rating and recommended improvements.
- Planning your visit
- Allow around 30–60 minutes for a typical home. Tell us your deadline when booking so we can confirm the visit and delivery arrangements.
- Coverage and price
- Based in Slough, serving London and the South East, generally within 50 miles. Check your postcode and final price in the booking form or ask for a quote.
What is an EPC?
An Energy Performance Certificate (EPC) rates a property's energy efficiency from A (most efficient) to G (least). An EPC is generally needed when a home is marketed for sale or rent; exemptions can apply.
The certificate lists the property's current rating, a potential rating after improvements, estimated running costs and tailored recommendations to improve efficiency. It is valid for 10 years. We lodge completed certificates on the official EPC register.
Our domestic energy assessors are fully accredited and insured. Every EPC we produce is compliant with the latest RdSAP methodology used by the government scheme.
What we need on site
A quick checklist to make sure your appointment runs smoothly.
- Access to every room, including loft hatches, cupboards, airing cupboards and any outbuildings.
- Sight of the boiler and hot water cylinder (if fitted) — model number is helpful but not essential.
- Any insulation paperwork, cavity-wall guarantees or recent installation certificates if you have them.
- An adult on site, or pre-arranged key-collection / agent access.
- Roughly 30–60 minutes uninterrupted, depending on property size.
What to expect
Your appointment, step by step
On arrival
Your assessor will introduce themselves, show ID and explain the survey. Nothing is moved, nothing is invasive — it's a non-disruptive visual inspection.
During the survey
We measure every room, photograph the boiler, windows, insulation evidence and lighting, and record construction details. Pets and tenants can stay in place throughout.
After the visit
The certificate is lodged to the national EPC register the same day. You receive a digital PDF copy by email, usually within 24 hours of the appointment.
What you get
An official EPC with energy rating, environmental impact rating, estimated running costs and a list of recommended improvements with payback estimates.
Why choose AG
Why landlords & agents book with us
Fully accredited assessors
Every assessor is qualified to Domestic Energy Assessor (DEA) level and registered with a government-approved accreditation scheme.
Same-day lodgement
We lodge to the EPC register on the day of the survey — useful when a sale, let or marketing launch is time-critical.
Transparent fixed pricing
Pay-after-service pricing from £60, scaled by property size. No deposit, no surprise add-ons.
Bundle and save
Add a floor plan for just £25 when booked alongside an EPC — perfect for letting agents and landlords prepping a listing.
Why you need this service
The practical and legal reasons this matters for your property.
- Stay legally compliant — required before marketing, selling or letting a property
- Check EPC requirements before marketing a home for sale or rent
- Check the separate minimum energy efficiency requirements and any exemptions applying to your rental
- Inform tenants and buyers of expected running costs
- Identify cost-effective upgrades to improve efficiency and EPC band
- An EPC is valid for 10 years; other property obligations still apply
Preview a real energy performance certificate (epc) before you book
Download a redacted sample and see exactly what you'll receive — every section, every detail, every page.
Frequently asked questions
How long does an EPC last?
10 years from the date of lodgement. You only need a new one sooner if you want to reflect efficiency improvements.
When do I legally need one?
An EPC generally needs to be ordered before marketing a home for sale or rent, unless an exemption applies. Minimum energy efficiency rules are a separate requirement; check the current official guidance for your property.
Do I need to be there?
Not necessarily — we're happy to collect keys from the agent or use a smart-lock code. Just let us know when booking.
Can the rating be improved?
Yes — the report includes prioritised recommendations such as loft insulation, LED lighting and boiler upgrades, each with cost and savings estimates.
Should I check for an existing EPC before booking?
Yes. Search the official Find an energy certificate service first. A valid certificate may already be available to download free of charge. If it has expired or the property needs reassessment, contact us with the postcode.
Can you guarantee my property will achieve an EPC C?
No. The rating depends on the property and the evidence available at assessment. We can explain the recommendations, but cannot guarantee a particular rating or savings.
Official guidance
Service information reviewed 20 October 2026. Check the official guidance for rules applying to your property.
Related property services
Why book with AG?
Clear service scope
Choose the service that matches your property and ask us about any specific requirements.
Simple communication
Manage your booking and contact the team through your customer portal.
Delivery confirmed
Tell us your deadline so we can confirm availability and report delivery before the visit.
Ready to book your EPC?
From £60 · No deposit · Pay after service · Free reschedule
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