01924 806 213 info@sublimeenergyservices.co.uk Hub 26 Hunsworth Lane, Cleckheaton, England, BD19 4LN

Whole-Home Retrofit Services

We deliver tailored retrofit solutions that help homeowners, landlords, and property professionals improve energy performance, compliance, and comfort.

Retrofit & Energy Assessment Services

Professional retrofit services designed to improve energy performance, ensure compliance, and future-proof your property.

Sublime Energy Services supports homeowners, landlords, and developers with Retrofit Assessments, Coordination, Installation, EPCs, Airtightness Testing, and Factor Temperature Calculations.

From initial evaluation through to project delivery, our team helps every stage stay clear, practical, and aligned with PAS 2035 retrofit standards.

Thermal imaging camera used during a home energy assessment
Home energy assessor inspecting a property window 01
Our Services

Retrofit Assessment

A Retrofit Assessment is the essential starting point for any home energy improvement project. Our qualified assessors review the condition, occupancy, ventilation, heating, insulation, and overall energy performance of your property.

The result is a clear report that gives you a practical roadmap for improvement and supports compliant whole-house retrofit planning.

  • Full property survey covering walls, roof, floors, heating, ventilation, and fabric condition
  • Clear recommendations to improve comfort, reduce heat loss, and support future works
  • Suitable for homeowners, landlords, developers, and funded retrofit projects
  • PAS 2035
  • Qualified Assessors
  • Elmhurst Accredited
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Retrofit coordinator reviewing property survey details 02
Our Services

Retrofit Coordination

Under PAS 2035, a Retrofit Coordinator is required for many medium and large retrofit projects. Sublime Energy Services coordinates the process from assessment to design, installation, monitoring, and final sign-off.

We help manage risks, align the right measures, and keep each stage documented so your retrofit journey stays organised and compliant.

  • PAS 2035 project oversight from start to finish
  • Coordination between assessors, designers, installers, and property stakeholders
  • Improvement plans that prioritise comfort, performance, and long-term value
  • PAS 2035
  • Retrofit Coordination
  • Whole-House Planning
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External wall insulation being installed on a home 03
Our Services

Retrofit Installation

Sublime Energy Services helps deliver the physical improvement works recommended through the retrofit process. Whether your property needs insulation, heating upgrades, ventilation improvements, or a staged whole-house plan, we focus on practical outcomes and quality workmanship.

Every measure is approached with the wider home in mind, helping avoid isolated upgrades that create new problems later.

  • Loft, wall, and floor insulation support
  • Heating, renewable, and ventilation improvement guidance
  • Installation work aligned with whole-house retrofit recommendations
  • TrustMark Accredited
  • Retrofit Installation
  • Quality Checked
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Energy assessor preparing property certificate paperwork 04
Our Services

Energy Performance Certificates (EPC)

An Energy Performance Certificate is required when selling, renting, or improving many properties. Our accredited assessors provide EPC surveys that help homeowners and landlords understand current ratings and improvement options.

We keep the process straightforward, with clear advice on the measures that can improve your rating and support compliance.

  • EPC surveys for homeowners, landlords, and property professionals
  • Clear explanation of rating results and improvement recommendations
  • Support for retrofit planning, funding, sales, and lettings compliance
  • EPC Assessors
  • Elmhurst Accredited
  • Landlord Support
Get Your EPC
Specialist testing equipment used during home performance work 05
Our Services

Airtightness Testing

Airtightness Testing, sometimes called an air pressure test or blower door test, helps identify unwanted draughts and hidden heat loss. It is a valuable step before and after retrofit works, especially where ventilation and fabric upgrades are planned.

Our testing helps you understand where energy is escaping so the right improvements can be prioritised.

  • Pre-work and post-work airtightness testing
  • Identification of draughts, leakage paths, and fabric performance issues
  • Useful evidence for retrofit planning and building performance checks
  • Airtightness Test
  • Heat Loss Check
  • Before & After Works
Book A Test
Building performance calculations reviewed for a retrofit project 06
Our Services

Factor Temperature Calculations

Factor Temperature calculations help identify the risk of condensation, mould growth, and heat loss at key building junctions. They are especially useful for retrofit designers, coordinators, developers, and property professionals working on fabric upgrades.

Sublime Energy Services provides practical analysis that supports better detailing, stronger compliance, and more reliable retrofit outcomes.

  • Review of key junctions including floors, walls, roofs, and window reveals
  • Support for retrofit design, SAP energy modelling, and compliance checks
  • Clear findings that help reduce thermal bridging and moisture risk
  • fRsi Calculations
  • Thermal Bridging
  • Compliance Support
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Complete Retrofit Solutions

Efficiency • Compliance • Performance

  • Retrofit Assessments
  • Retrofit Coordination
  • Retrofit Installation
  • Energy Performance Certificates
  • Airtightness Testing
  • Factor Temperature Calculations
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Sublime Energy Services retrofit specialist
2,000+ Properties Improved

About Us

West Yorkshire's Trusted Whole-House Retrofit Specialists

Sublime Energy Services provides practical retrofit and energy improvement support for homeowners, landlords, and property professionals across West Yorkshire and the UK.

Our whole-house approach helps each project move from assessment to completion with clear guidance, compliant documentation, and reliable energy performance outcomes.

  • Retrofit Assessment
  • Retrofit Coordination
  • Retrofit Installation
  • Energy Performance Certificates
  • Airtightness Testing
  • Factor Temperature Calculations
TrustMark Accredited Retrofit Installation
Elmhurst Energy Accredited Assessors
Simply Certification Quality Assured
24/7 Support Always available

Why Choose Sublime Energy Services?

24/7 Service

Sublime Energy Services is available to assist you at all times, 24 hours a day and 365 days a year.

Expert & Qualified Team

Our experienced professionals deliver high-quality retrofit solutions, improving your home's energy efficiency, comfort, and performance.

Save Time & Money

Save time and money with our professional retrofit services, helping reduce running costs and improve comfort without the hassle.

Sublime Energy Services Retrofit Solutions

Energy assessor using a tablet during a property survey

Retrofit Assessment

A Retrofit Assessment is the essential first step to improving your property's energy efficiency. Our qualified assessors review your home and recommend the right measures to reduce bills and improve comfort.

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Property professional inspecting a window during a home survey

Retrofit Coordination

Our Retrofit Coordinators help manage your project from start to finish, keeping works aligned with PAS 2035 standards, planned properly, and clearly documented through to sign-off.

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Worker installing insulation on a building

Retrofit Installation

From insulation and heating upgrades to renewable improvements, our installation support helps projects meet the required standard and stay focused on quality, comfort, and compliance.

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Home inspection professional checking property details

Energy Performance Certificates (EPC)

An up-to-date EPC is required when selling, renting, or improving a property. Our qualified assessors carry out surveys and issue certificates to help you meet legal requirements.

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Worker sealing a window frame for improved airtightness

Airtightness Testing

Airtightness Testing measures how much heat your property loses through gaps and draughts. Our testing helps identify problem areas and prioritise the most effective improvements.

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Construction worker carrying out residential retrofit work

Factor Temperature Calculations

We provide thermal bridging analysis to assess heat loss at key junctions. Using accurate calculations, we help improve energy performance and support current building compliance.

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Do I Need a Retrofit Assessment?

Whether you're looking to cut energy bills, improve your home's comfort, or meet new energy efficiency standards, a professional Retrofit Assessment is the essential first step. Our qualified assessors and coordinators work with homeowners, landlords, and developers across the UK to identify the right improvements for your property.

Our retrofit services may be right for you if any of the following apply:

  • Your home has a low Energy Performance Certificate (EPC) rating
  • You want to improve loft, wall or floor insulation
  • You're a landlord needing to meet minimum EPC requirements
  • You want to replace an old or inefficient boiler
  • You'd like an Airtightness Test before or after works
  • You're planning a home renovation or extension project
  • You need a qualified Retrofit Coordinator to manage your project
  • You require an up-to-date Energy Performance Certificate (EPC)
Book an Assessment
  • Gas Safe Register
  • Government of the UK
  • Green Deal Approved
  • MCS Certified
  • NICEIC
  • Quality Mark
  • TrustMark Government Endorsed Quality
  • UKAS Management Systems

FAQ's

Sublime Energy Services 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. I recently had retrofit assessment work completed by Sublime Energy Services and could not fault them. The team was friendly, professional, and clear throughout. I would highly recommend them for retrofit services.

  • James Harris ★★★★★

    I was cautious about starting retrofit work, but Sublime Energy Services made the process straightforward. They explained the assessment, EPC requirements, and next steps clearly, and I am really pleased with the results.

  • Amelia Clarke ★★★★★

    Thanks to the team at Sublime Energy Services for improving the energy performance of my home. The work was completed quicker than expected, communication was excellent, and the service exceeded my expectations.

  • Louis Parker ★★★★★

    Great job. I was impressed with how the team communicated and the helpful advice they provided. The retrofit guidance was practical, professional, and tailored to my property.

  • Olivia Morris ★★★★★

    Professionalism at its best. The Sublime Energy Services team carried out the assessment and planning with care, kept everything clear, and made the whole process feel simple.

Get in Touch About Our Services...

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