Real homes. Measured outcomes.
Every case study below is a real install with the homeowner's permission — meter readings, EPC bands, what we did, what it cost (or didn't cost, on a funded scheme), and what the family is paying now. No staged photography, no inflated savings, no anonymous testimonials.
No cost. No obligation. No pressure.
0+
Case studies on file
Across our four service counties
£0
Annual customer saving
Combined across the cases below
0 avg
EPC bands lifted
Two full bands on whole-house retrofits
Filter by measure
Pick the install closest to your house.
- MaidstoneMarch 2026
GBIS cavity + room-in-roof insulation on a 1960s Maidstone dormer
Cavity walls plus between/over-rafter insulation to the dormer spaces. EPC D → C, £370/yr saved, £420 top-up for the room-in-roof element.
- +12 points
- -30%
- £370/yr saved
- WithamFebruary 2026
ASHP + solar + battery on a 1980s Witham detached, BUS-funded
Replaced an 18-year-old gas combi with a 9kW ASHP, added 5kW solar PV and a 10kWh battery. EPC C → A, £1,640/yr saved, BUS covered £7,500.
- +18 points
- £1,640/yr saved
- Better than modelled
- CambridgeFebruary 2026
Solid wall internal insulation + multifoil room-in-roof on a Cambridge Victorian
Sympathetic IWI on the front rooms, multifoil to the room-in-roof loft conversion. EPC E → C, £1,120/yr saved, ECO4 + LA Flex stacked.
- +22 points
- £1,120/yr saved
- 8x improvement
- LowestoftFebruary 2026
ProPERLA wall coating + cavity insulation on a coastal Lowestoft semi
BBA-certified ProPERLA exterior coating + cavity wall insulation on a salt-exposed coastal property. EPC D → C, £620/yr saved, condensation eliminated.
- +13 points
- Back to normal range
- £620/yr saved
- IpswichJanuary 2026
Oil boiler → air-source heat pump swap in an Ipswich village home
£7,500 BUS grant secured, existing radiators retained, heat output validated on a -2°C morning.
- +12 points
- £590/yr saved
- Fully claimed
- ChelmsfordJanuary 2026
Multifoil retrofit on a 1930s Chelmsford semi — loft rafters + garage ceiling
Actis Hybris multifoil between loft rafters plus garage-ceiling application. EPC D → C, £620/yr saved, bedroom-above-garage 4°C warmer.
- +14 points
- -39%
- ~£620/yr saved
- ColchesterNovember 2025
Whole-house retrofit on a 1950s Colchester semi, fully ECO4 funded
EPC D → B, £892/yr saved, customer contribution £0. Loft + cavity + underfloor + radiator programmers in six working days.
- +24 points
- £892/yr saved
- Fully ECO4 funded
- IpswichNovember 2025
ECO4 full retrofit on a 1970s Ipswich bungalow — cavity, loft, boiler, controls
Cavity + 300mm loft + 96% A-rated boiler + smart thermostat. EPC E → B (3-band jump), £1,040/yr saved, customer contribution £0.
- +42 points (3 bands)
- -55%
- £1,040/yr saved
- MaidstoneOctober 2025
GBIS-funded loft top-up for a Maidstone bungalow
100mm → 300mm loft top-up, GBIS grant covered 100%. Install completed in under four hours.
- +21 points
- £340/yr saved
- Fully GBIS funded
- CambridgeAugust 2025
Solar + battery install on a south-facing Cambridge townhouse
4.2kW solar array, 10kWh battery, SEG export tariff. Bill down from £1,840 to £312/year in the first 12 months.
- +12 points
- £1,528/yr saved
- -78%
Why OMEGA
The honest reasons people pick us over the cheapest quote.
We're not the cheapest installer in Essex — and we say so out loud. What you get instead is the discipline that makes a measure actually deliver what it promised in the quote, for the next two decades.
0
subcontractors
One team, one contract
The person who quotes is on the same payroll as the engineer on your roof — and on the same phone line when something needs fixing in year four.
48
hours to written quote
Transparent fixed pricing
A written, line-by-line quote within 48 hours of your survey. Every option priced, every scheme checked, no day-of upsells, no sign-now discounts.
4
active funding routes checked
Grant paperwork handled
ECO4, GBIS, BUS, HUG2 — we check every live scheme on the first visit and file the paperwork in our name. You never see a form if you don't want to.
25+5
year cover, product + workmanship
Guarantee you can actually claim
25-year insurance-backed product cover (CIGA, SWIGA, manufacturer) plus our own 5-year workmanship guarantee. If anything's not right, we come back out.
Free 45-minute survey. Written plan. Real numbers, your house.
Every case study above started with the same free home energy survey you can book today. Same surveyor, same fixed-price quote, same 25-year guarantee. Where a grant applies, we file it for you.
No cost. No obligation. No pressure.
25-year product guarantee. 5-year installation guarantee. If anything isn't right, we fix it free.