Retrofit Company

Trusted by our clients:

Social Housing Providers

Easily meet EPC targets – with PAS2035 assessments, grant access, and retrofit coordination, managed end-to-end.

Institutional Real Estate Investors

Remove the risk of guesswork – our software provides accurate retrofit strategies and costs across your asset portfolio.

Private Sector Landlords

Boost your rental returns – from retrofit assessment to installation, we make EPC upgrades simple and effective.

Smart Tech, Real Expertise & Zero Jargon

We combine data-led software with hands-on experience to simplify retrofit from beginning to end.

Our platform delivers remote retrofit assessments. Our team delivers on-the-ground project management. Together, we turn confusing policy and process into a simple retrofit plan.

And with expert advice, trusted installers, and access to over £1bn in grant funding each year, we save you time, money and make the process pain-free.

Energy efficiency isn’t just a target. It’s an opportunity. Let’s make it work for you.

About Us

Smart Tech, Real Expertise & Zero Jargon

Whole House Retrofit

Retrofit works best when it all works together. We plan practical upgrades, manage the sequencing and maximise your value.

Reduce energy demand

Energy-efficient sources

Hygiene factor

Draughtproofing

Wall insulation: cavity, or solid wall (exterior or interior wall)

Solar panels: with or without batteries

Heat pumps: air source, ground source, water source

Energy Modelling: simulates your home’s energy use to predict savings from upgrades

Home Energy Assessment: a full check of your home’s energy efficiency with improvement advice

EPC: rates your home’s efficiency (A–G) and suggests ways to improve it

Key:

Draughtproofing

Wall insulation: cavity, or solid wall (exterior or interior wall)

Solar panels: with or without batteries

Heat pumps: air source, ground source, water source

Energy Modelling: simulates your home's energy use to predict savings from upgrades

Home Energy Assessment: a full check of your home's energy efficiency with improvement advice

EPC: rates your home's efficiency (A–G) and suggests ways to improve it

We help people live greener,

healthier, happier lives

How It Works

Retrofit in 5 Easy Steps

1

Remote Portfolio Assessment

Using just your postcodes and our advanced software, with over 4 billion data points, we assess your entire portfolio in minutes – with 97% accuracy and zero disruption.

2

Onsite Survey & Retrofit Design

A certified assessor carries out a detailed, PAS 2035-compliant survey. You’ll receive a fully costed, tailored retrofit plan to help reach your energy efficiency goals.

3

Secure Funding

We help unlock government funding through schemes like ECO, GBIS, SHDF, HUG & the Boiler Upgrade Scheme. Need more support? We’ll connect you to lenders or help design a bespoke finance package.

4

Assign an Installer

We remove the pain of tendering by matching your project with trusted, accredited installers from our network – all certified by TrustMark, MCS, or the Federation of Master Builders.

5

Project Coordination & Sign-Off

Your dedicated retrofit coordinator oversees all works, from start to finish. We ensure quality delivery, provide reporting support, & issue a digital building passport with optional EPC certification.

Powered by Tech, Driven by Experts

Remote, accurate assessments in minutes, powered by industry-leading software.

125 Princess Road

AB1 2CD

Recommendations:

Works Package

Total Cost:

£13.1k

Trades Required:

1-2

Estimated Duration:

1-2 weeks

1

Energy Efficiency Impact

Current EPC Rating:

45 E

Expected EPC Rating:

71 C

Total SAP Improvement:

26.1

2

Gains

CO2 Reduction:

3.5 t

Energy Savings:

14,712 kWh

Energy Bill Savings:

£1,801

3

Current Property Value

£586,000

4

After Retrofit Valulation

£602k – £624k

Estimated Improvement

£16k – £38k

5

Funding Options

6

All property types

Portfolio-level

Cost-efficient

Personalised

Unobtrusive

Fast

97% accuracy

4 bn data points

Cutting-edge AI and ML

Retrofit Software

Why Choose Domna?

A smarter way to retrofit.

One-stop retrofit partner

We bring assessment, design, coordination, and funding together in one seamless service – no juggling multiple suppliers.

Faster, easier & more effective

We combine smart tech with real-world delivery, by providing services and software side by side, so you reap the benefits of both.

Accurate data-driven assessments

Our AI-powered modelling uses 4bn data points to deliver 97% accurate insights on scope, cost, and value – all from the outside in.

360 funding support

We help you access government grants, green finance, and connect you with certified lenders to get your project moving.

Bulk contracting at scale

Tap into our nationwide network of accredited installers – saving time, cutting costs, and ensuring consistent quality.

Fully impartial advice

We’re not tied to any products or providers, so you get the best solution for your property – not for someone else’s sales target.

Our Clients

We cut 20,000+ tonnes of emissions, save households over £7 million and add £114 million in property value, every year. It’s no wonder thousands of clients trust us as their retrofit experts.

FAQs

Your questions answered

What is a Whole House Retrofit, and why does it matter?

How does Domna’s tech-led assessment work?

Who can benefit from Domna’s services?

What funding support does Domna offer?

How is Domna different from traditional retrofit providers?

Is Domna tied to specific products or service providers?

In the News

See how we’re making headlines, and shaking up the retrofit industry.

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Inside Housing

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