Making energy-efficient living accessible to every homeowner
At Sublime, we are on a mission to improve homes across the UK, reducing carbon emissions, cutting energy bills, and making homes more comfortable for homeowners and landlords alike.
About Us
Who We Are
West Yorkshire's Retrofit Specialists
Sublime is a market-leading insulation, heating, and renewables company operating from the edge of West Yorkshire. We take a whole-house approach to every project, combining excellent workmanship with a commitment to lasting energy efficiency.
With over 2,000 eco measures installed across the United Kingdom, our growing team delivers comprehensive retrofit services helping homeowners and landlords achieve genuine, measurable improvements in comfort and energy performance.
2,000+
Eco measures installed
Across the UK
Project coverage
5★
Workmanship standard
Our Retrofit Services
- Core Retrofit
- Retrofit Assessment
- Retrofit Coordination
- Retrofit Design
- Energy Performance Certificate (EPC)
- Air Testing
- U-Factor & Temperature Calculations
Our Accreditations
- Elmhurst Energy Accredited
- Gas Safe Registered
How does our Retrofit Service Work?
Sublime is dedicated to helping homeowners and landlords improve their properties through our comprehensive Retrofit service. We understand that every home is different, that's why we take a whole-house approach, assessing your property from top to bottom before recommending any measures.
Our qualified Retrofit Assessors and Coordinators manage the entire process for you, from initial assessment through to design, installation and final sign-off, ensuring your home meets the highest standards of energy performance and comfort.
-
01
Retrofit Assessment A thorough survey of your home's current energy performance and condition.
-
02
Retrofit Design A tailored improvement plan designed around your budget, lifestyle and property type.
-
03
Retrofit Coordination We manage every trade, every measure and every sign-off on your behalf.
-
04
EPC & Handover A new Energy Performance Certificate and full documentation once works are complete.
Committed to transforming homes through whole-
house Retrofit, for a warmer, greener future
A future where every home is fully retrofitted and carbon-neutral
We support homeowners and landlords through each stage of the retrofit journey, from assessment and design to installation and sign-off, with solutions that lower energy costs and create healthier homes.
FAQ's
Sublime provides clear pricing based on your property type, size, and assessment requirements. We confirm the cost before any work begins, so you know exactly what is included.
A Retrofit Assessment is a detailed property survey covering condition, occupancy, ventilation, heating, insulation, and energy performance. Our qualified assessors use it to recommend the right improvements for your home.
Yes. We support landlords with Retrofit Assessments, Energy Performance Certificates, and improvement planning to help properties meet current EPC standards and future energy efficiency expectations.
We offer Retrofit Assessment, Retrofit Coordination, Retrofit Installation, Energy Performance Certificates, Airtightness Testing, and factor temperature calculations, with packages tailored to each property.
Timescales depend on the size of the property and the scope of works. A standard assessment is usually completed in one visit, and our team will explain the next steps and project timeline clearly.
What Homeowners Have To Say...
-
Sarah Wilson ★★★★★
Excellent company. Sublime helped us understand the grant process and arrange heating improvements without confusion. The team was friendly, professional, and clear from start to finish.
-
James Harris ★★★★★
I was unsure about inviting people into my home, but the Sublime team put me at ease. They explained the insulation options clearly and completed the work to a high standard.
-
Amelia Clarke ★★★★★
Thanks to the team for helping with our old heating system. The work was completed quicker than expected, communication was excellent, and the house feels much warmer.
-
Louis Parker ★★★★★
Great job. I liked how the team communicated and gave useful advice before the installation. The process felt organised, practical, and easy to follow.
-
Olivia Morris ★★★★★
Professionalism at its best. The team fitted our insulation neatly, kept disruption low, and made sure everything was explained before they left.