GGI

GGI – Green Grant Installs is a UK-based whole-house retrofit specialist offering air source heat pumps, solar PV systems, and a broad range of energy-efficiency solutions for domestic, commercial, and social housing clients across the United Kingdom.

Operating under the legal entity Green Grant Installs Ltd, GGI positions itself as an integrated retrofit provider, combining modern heating technologies, renewable energy generation, and building fabric improvements under a single, coordinated service. This whole-house approach aims to deliver warmer, lower-carbon properties with reduced energy bills for homeowners, businesses, and housing providers alike.

GGI holds accreditations with NAPIT and is a registered member of the Renewable Energy Consumer Code (RECC), placing the company within established UK frameworks for installer competence and consumer protection in the renewables and retrofit sector.

Company background

Green Grant Installs Ltd is a registered UK limited company, incorporated under company number 12732896. The company trades under the brand GGI – Green Grant Installs and is associated with the Bury area of the United Kingdom. It operates primarily within the UK heat pump and retrofit market, with its services aligned to nationally recognised grant schemes and retrofit standards.

GGI describes itself as an award-winning whole-house retrofit specialist, reflecting an organisational focus on integrated energy upgrades rather than single-measure installations. The company has developed a structured service offering that spans heating systems, renewable energy, insulation, and retrofit coordination, supported by formal processes including a complaints procedure and privacy policy in line with UK regulatory expectations for accredited installers.

Heat pump and retrofit services

GGI offers a comprehensive range of heat pump and energy-efficiency services, designed to address both heating provision and demand reduction within residential, commercial, and social housing properties. Key services include:

• Air source heat pumps: Supply and installation of air source heat pump systems as part of an integrated retrofit plan, eligible for funding through the Boiler Upgrade Scheme (BUS Grant), providing efficient heating and hot water for homes and businesses.
• Solar PV systems: Installation of solar photovoltaic systems for homes and commercial properties, helping clients generate their own electricity and reduce reliance on grid energy to complement heat pump systems.
• Infrared and storage heating: Installation of modern infrared and electric storage heating systems, offered as part of a wider whole-house retrofit strategy to improve comfort and efficiency.
• Electric storage heaters: Specialist installation and upgrading of electric storage heater systems, designed to complement low-carbon generation or off-peak energy tariffs.
• Underfloor insulation: Building fabric improvements including underfloor insulation to reduce heat loss and enhance the performance of heating systems and generation technologies.
• Retrofit assessment and coordination: Structured assessments and project coordination aligned with PAS 2035, the UK standard for domestic retrofit, guiding clients through the full process from initial survey to completed installation.
• Commercial energy solutions: Energy-efficiency and low-carbon heating upgrades for business clients, supported where applicable by relevant incentive schemes.
• Council and social housing retrofit: Dedicated retrofit programmes for local authorities and housing associations, structured around the Warm Homes Plan and PAS 2035 guidance to improve energy performance and heating across social housing stock.

Grants and funding support

GGI actively supports clients in navigating the range of UK government grant schemes and funding initiatives available for heat pump and retrofit installations. The company provides guidance on the Boiler Upgrade Scheme (BUS Grant) for air source heat pumps, the Warm Homes Plan, and PAS 2035-compliant retrofit assessments. This educational approach helps homeowners, social landlords, and commercial clients understand their eligibility and access funding to offset the cost of heating upgrades and energy-efficiency improvements.

By aligning its services with recognised grant frameworks and industry standards, GGI aims to make whole-house retrofit and heat pump installation accessible and straightforward for a broad range of property owners and housing providers.

Accreditations and quality standards

GGI – Green Grant Installs holds the following accreditations and memberships, reflecting its commitment to quality, consumer protection, and compliance within the UK renewables and retrofit sector:

• NAPIT: Registered with the National Association of Professional Inspectors and Testers (NAPIT reference: NAP-67941), confirming compliance with recognised technical standards for installation work.
• RECC: Member of the Renewable Energy Consumer Code (membership number: 00072053), providing clients with consumer protection assurances when purchasing renewable energy products and services.
• PAS 2035: Retrofit assessments and coordination services are structured in accordance with PAS 2035, the UK standard governing roles, risk assessment, and quality assurance for domestic energy-efficiency upgrades.

Pricing information

GGI does not publicly list fixed prices for its heat pump or retrofit services, as costs vary depending on the property type, size, existing heating infrastructure, and the specific combination of technologies selected. A whole-house retrofit incorporating heat pump installation, solar PV, and insulation improvements will typically differ in cost from a standalone heat pump installation. Clients are encouraged to contact GGI directly to discuss their requirements and receive a tailored assessment and quotation.

Where eligible, the cost of air source heat pump installations may be significantly reduced through government grant schemes, including the Boiler Upgrade Scheme (BUS Grant) and the Warm Homes Plan. GGI assists clients in identifying and applying for relevant funding, which can form a meaningful part of the overall project cost planning.