Sustain Homes

What Sustain Homes does

Sustain Homes is a UK-based residential energy services company headquartered in Watford, Hertfordshire, operating as a private limited company (Sustain Homes Limited) founded in 2020. The company designs and installs solar PV systems, battery storage (including Tesla Powerwall 3 and Fox ESS systems), air source heat pumps, and high-efficiency gas boilers for UK homeowners, landlords, and businesses. Its core technical capability centers on MCS-accredited heating system design via the Design House sub-brand, led by a CIBSE-affiliated Senior Designer, using proprietary heat-loss modelling software with a 5-day turnaround, alongside accredited installation of Trina Solar panels, Fox inverters, and major boiler brands (Worcester Bosch, Vaillant, Ideal). The business is supported by an integrated technology stack including Smart Export Guarantee integration, solar monitoring apps, and EV charger add-ons (Zappi, MyEnergi Eddi).

The company generates revenue through two primary mechanics: one-time installation fees for solar, heat pumps, and boilers (£1,850-£13,000 per job), and recurring monthly subscription revenue from HomePlans and Landlord Plans (£10-£30 per month) covering servicing, repairs, and home emergencies. On-demand fixed-price repairs (from £75) and Smart Export Guarantee payments provide additional transaction-based revenue. Sustain sells primarily direct-to-consumer via its website, phone-based inside sales, and a 24/7 customer success team, supplemented by field engineers and group-buying schemes through Solar Together partnerships with Berkshire, Hampshire, and Wiltshire councils.

Sustain serves a diversified residential customer base spanning homeowners, private landlords, and Solar Together group-buying participants, with no disclosed enterprise anchors. The company holds MCS, RECC, NICEIC, GasSafe, and Trustmark accreditations, is B Corp certified, and is a Tesla Certified Installer. Ownership appears concentrated among three directors (Adam, David, and Julie) with no disclosed external funding, making Sustain a bootstrapped, founder-led operator in the UK home energy transition market.

Name

Sustain Homes

Legal name

Sustain Homes Limited

Website

https://sustainhomes.co.uk

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

11–50 employees

Short description

Sustain Homes is a UK-based residential energy services company founded in 2020 that designs and installs solar PV, battery storage, air source heat pumps, and gas boilers for homeowners and landlords, supported by subscription home care plans and MCS-accredited in-house heating design.

Ownership category

akta.pro rank

Product category

Residential Renewable Energy and Heating Services

NAICS

Solar Electric Power Generation (221114)

SIC

Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Residential Demand Response (Smart Thermostats, HVAC, Water Heating, Home Batteries) (EUAFAGAA)

akta.pro secondary industry

Community Solar Development & Subscription Management (EUAMAJAA)

Keywords

• Solar PV installation
• Air source heat pumps
• Home boiler installation
• Battery storage systems
• Home maintenance plans

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Solar PV Installation: One-time installation of solar panels and battery systems. Revenue generated from equipment sales, installation labor, and optional extras (bird proofing, immersion diverters).
2. Boiler Installation: One-time boiler supply and installation. Customers can pay in full or spread costs. Includes warranty and 12 months cover.
3. HomePlans (Subscription): Monthly recurring subscription plans (My System Plan, My Heating, My Home, My Green Home) covering boiler/heating maintenance, repairs, and home emergencies. Plans range from £11.99 to £30/month.
4. Heat Pump Service Plans: Subscription plans for heat pump servicing and repair. My Service plan at £15.99/month, My Heat Pump at £21.99/month, My Green Home at £27.99/month.
5. Air Source Heat Pump Installation: One-time heat pump installation with government BUS grant support (£7,500). Typical installation costs £8,500-£13,000 before grant.
6. On-Demand Repairs: Fixed-price one-off repair services for boilers, plumbing, and electrics starting from £75. No fix no fee guarantee.
7. Landlord Plans: Monthly subscription plans for landlords covering boiler certification, heating repairs, and plumbing. My Boiler from £18/month including LGSR certificate.
8. Smart Export Guarantee (SEG): Revenue from selling excess solar electricity back to the grid through SEG tariff.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Sustain Homes designs, installs, and maintains residential renewable energy and heating systems including solar PV panels with battery storage, air source heat pumps, and high-efficiency gas boilers. The company generates recurring revenue through subscription home care plans (HomePlans, Landlord Plans, heat pump service plans) and offers fixed-price on-demand boiler, plumbing, and electrical repair services. Operations span nationwide UK coverage with concentration in South East England, supported by an in-house indemnified heating design service (Design House) and group-buying partnerships via Solar Together schemes.

Product overview

Sustain Homes is a multi-award winning sustainable home improvements company offering a integrated suite of renewable energy and heating products and services. The core portfolio consists of Solar PV systems, Tesla Powerwall battery storage, Air Source Heat Pumps, and Boiler Installation/maintenance, supported by Design House for professional heating system design. Recurring revenue is generated through HomePlans and Landlord Plans (monthly care and maintenance packages), while On-Demand Repairs provides ad-hoc fixed-price plumbing, heating, and electrical services. The company is B Corp certified and MCS accredited for solar and heat pump installations, with coverage nationwide.

Differentiator

Problem solved

Functional benefit

Brands

• Design House: A specialised service designing plumbing, heating and renewable heating systems for house builders, equipment manufacturers and architects.
• HomePlans

Products and services

• Solar PV

Quantifiable outcome

• Average annual electricity savings of £610/year with solar installations in London & South East England
• +4 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• TeslacoreTechnology or IntegrationSustain is a Tesla Certified Installer offering Tesla Powerwall 3 home battery systems. Powerwall provides 11.5kW output for whole-home backup protection, integrated solar inverter, and 24/7 energy monitoring via Tesla app.
• Solar TogethercoreStrategic or Co-development PartnerPartnership with Solar Together and local councils to deliver group buying solar and storage schemes in Berkshire, Hampshire, and Wiltshire. Sustain provides installation and design services for high-specification systems.
• EcologicoreStrategic or Co-development PartnerClimate partnership with Ecologi. Sustain invests in world-class climate crisis solutions and plants trees in their company forest. All installations and staff carbon footprints are offset.
• Herts Young HomelessminorOthersPartnership with Herts Young Homeless charity to help end youth homelessness across Hertfordshire. Through volunteering and fundraising events, Sustain supports the next generation.
• Government (Boiler Upgrade Scheme)coreStrategic or Co-development PartnerAs an approved installer, Sustain helps customers access the government's Boiler Upgrade Scheme providing grants up to £7,500 for air source heat pump installations.
• Local Councils (Berkshire, Hampshire, Wiltshire)coreGTM or Marketing PartnerPartnership with local councils for Solar Together group buying schemes, delivering high specification solar systems throughout the region designed and delivered by local teams.
• Worcester BoschcoreChannel Partner/ Reseller/ DistributorAccredited Worcester Bosch installer. Offers up to 12-year warranty on Worcester installations. Which? Best Buy award winner for 10 consecutive years.
• VaillantcoreChannel Partner/ Reseller/ DistributorVaillant Advanced Installer status, allowing extended warranty offerings on Vaillant products.
• IdealcoreChannel Partner/ Reseller/ DistributorIdeal MAX accredited installer offering up to 12-year warranty on Ideal installations.
• Trina SolarcoreTechnology or IntegrationTrina Vertex S 415W solar panels used in installations. 15-year product warranty and 25-year performance warranty.
• Fox ESScoreTechnology or IntegrationFox grid-tied and hybrid inverters (S & F Series, H1) used in solar installations. Sustain holds ELITE installer status. Max efficiency 97.2-97.8%.

Scale indicators10 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Local Heroes (British Gas): British Gas-owned marketplace connecting customers with local trades for plumbing, heating, and electrical work — overlapping Sustain's on-demand repairs, boiler, and field-engineer service model.
• Hometree: UK provider of home cover plans covering boilers, heating, plumbing, and electrics on a subscription basis — directly comparable to Sustain's HomePlans and Landlord Plans subscription products.
• BOXT: UK D2C installer selling boilers, heat pumps, and air conditioning online with fixed pricing, similar in model to Sustain's digital-first, fixed-price installation approach across heating and renewable categories.

Broad incumbents

• HomeServe: Major UK home emergency, plumbing, and heating cover provider with large subscription base; overlaps with Sustain's HomePlans and landlord cover offerings at a much larger scale.
• Octopus Energy: UK energy supplier increasingly offering heat pump, solar, and battery installations, leveraging its customer base for lower-CAC lead generation — a structural competitive threat to Sustain.
• EDF Energy: UK energy supplier with a home renewables and heating installation offering, including solar and heat pumps, leveraging customer base similar to other incumbent energy peers.
• British Gas: UK's largest boiler and heating services provider with nationwide engineer network and brand recognition; competes with Sustain across boiler installation, servicing, and home cover.
• E.ON UK: Major UK energy supplier offering solar PV, battery storage, and heat pump installations under its home solutions business — competing across Sustain's renewable product lines.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/sustainhomesuk
• Facebookfacebook.com/sustainhomes
• LinkedInlinkedin.com/company/sustain-homes

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sustain Homes