At EPC Sussex, we specialize in providing professional energy consultancy services for both residential and commercial properties across the UK. Our expertise in energy efficiency consultancy helps homeowners, landlords, developers, architects, and businesses confidently navigate energy efficiency requirements, building regulations, and sustainability goals.
We offer a comprehensive range of services including Energy Performance Certificates (EPCs), SAP Calculations (Part L), U Values, Over Heating Calculation (Part O), Air Testing, Water Calculations (Part G), SBEM Calculations, Legionella Risk Assessments, Heat Loss Calculations, Retrofit Advice, and energy efficiency consultancy. Whether you are constructing a new development, converting an existing property, or looking to enhance the energy performance of your building, we deliver clear, practical, and cost-effective solutions tailored to your project.
Our approach combines technical expertise with straightforward advice, ensuring compliance with current legislation while helping clients reduce energy consumption, lower running costs, and improve environmental performance.
With a commitment to accuracy, professionalism, and exceptional customer service, EPC Sussex supports projects of all sizes throughout every stage of the building life cycle—from design and planning through to completion and certification.
Contact us today to discuss your project and discover how our energy consultancy services, including Energy Performance Certificates and SAP Calculations, can help you achieve compliance, efficiency, and long-term value.
Compliance is essential for both landlords and property developers in the UK, ensuring that properties are safe, energy efficient, and legally compliant while protecting owners from costly fines, enforcement action, and potential legal disputes. For landlords, meeting requirements such as Energy Performance Certificates (EPC) regulations, electrical and gas safety, fire safety, Legionella risk assessments, and housing standards helps protect tenants, maintain property value, and ensure properties can be legally let. Moreover, working with an Energy Efficiency Consultancy can provide valuable insights into optimizing energy use. For developers, compliance with Building Regulations—including Part L (Energy Efficiency), Part O (Overheating), Part G (Water Efficiency), and other relevant standards—is critical to achieving planning approval, Building Control sign-off, and successful project completion. Accurate SAP Calculations can further enhance compliance efforts, laying the groundwork for energy-efficient designs. By prioritising compliance from the outset, landlords and developers can reduce delays, avoid expensive remedial works, improve the quality and efficiency of their buildings, and provide safe, sustainable properties that meet current and future legislation.

EPCs and Floor Plans for Domestic Properties
Landlords need to ensure their properties comply with various regulatory requirements, including Energy Performance Certificates (EPCs), Electrical Installation Condition Reports (EICRs), Gas Safety Certificates, Legionella Risk Assessments, smoke and carbon monoxide alarm regulations, and Minimum Energy Efficiency Standards (MEES). Engaging an energy efficiency consultancy can help landlords navigate these obligations and enhance the safety, health, and energy efficiency of homes for tenants.
Failure to adhere to current legislation regarding EPCs and other certifications can lead to substantial financial penalties, challenges in regaining possession of a property, invalidated insurance policies, and possible prosecution in severe cases. As regulations and SAP calculations continue to evolve, staying informed is increasingly essential for landlords managing residential or commercial properties.
Energy Performance Certificates (EPCs) offer a comprehensive assessment of a property's energy efficiency, assisting owners, landlords, tenants, and purchasers in understanding both the energy performance and the running costs associated with a building. As a legal requirement when a property is built, sold, or rented, EPCs provide a rating from A (most efficient) to G (least efficient), along with recommendations for enhancing energy efficiency through Energy Efficiency Consultancy.
For domestic properties, EPCs evaluate various factors such as insulation levels, heating systems, hot water provision, glazing, and renewable technologies to generate an overall energy rating. In contrast, for commercial properties, EPCs analyze the building's construction, heating, cooling, ventilation, and lighting systems to assess its energy performance. The inclusion of SAP Calculations in this process ensures that assessments are accurate and in line with established guidelines.
It is crucial to maintain a valid EPC for compliance with current legislation, particularly for landlords who must adhere to Minimum Energy Efficiency Standards (MEES) before renting out many properties. At EPC Sussex, we specialize in providing professional Domestic and Commercial EPCs across a diverse array of property types, offering precise assessments, clear guidance, and practical recommendations to improve energy performance and ensure adherence to current regulations.
Our topographic surveys offer detailed insights into the natural and man-made features of your property. Utilizing state-of-the-art equipment, we produce accurate and reliable surveys that serve various purposes, such as land-use planning, engineering design, and supporting our Energy Efficiency Consultancy efforts. Additionally, our surveys play a crucial role in generating Energy Performance Certificates and conducting SAP Calculations.
Professional marketing floor plans are an essential tool for showcasing a property's layout clearly and attractively. Designed for estate agents, developers, landlords, and homeowners, our floor plans provide prospective buyers and tenants with an easy-to-understand representation of the property's size, room layout, and flow. A high-quality floor plan can increase online engagement, improve buyer confidence, and help properties stand out in a competitive market while also supporting Energy Efficiency Consultancy initiatives.
We produce accurate, professionally presented floor plans suitable for property sales, lettings, planning applications, and marketing brochures. In addition to our floor plans, we can assist with Energy Performance Certificates and SAP Calculations to ensure your property meets necessary efficiency standards. Available in both colour and monochrome styles, our plans can be branded to suit your business and supplied in a range of digital formats for use on property portals, websites, and printed materials.
SAP & EPC's for New Builds & Extensions
Part L Compliance
Part L of the Building Regulations establishes the standards for conservation of fuel and power in buildings, ensuring new and existing properties are designed to achieve high levels of energy efficiency. Compliance with Part L is legally required for most new-build developments, extensions, conversions, and certain refurbishment projects throughout England and Wales.
To demonstrate Part L compliance, energy efficiency consultancy is often employed, involving SAP Calculations for residential properties or SBEM Calculations for commercial buildings. These assessments evaluate critical aspects such as building fabric, insulation levels, heating systems, ventilation, lighting, and renewable technologies. This ensures that the property not only meets the required energy performance targets but also that the designs are implemented correctly in line with all applicable requirements.
Our as-built surveys provide accurate and detailed information about the layout and dimensions of existing structures, which is essential for effective energy efficiency consultancy. We collaborate closely with architects, engineers, and contractors to ensure that their designs not only meet all applicable requirements but also align with energy performance certificates and SAP calculations.
Our as-built surveys provide accurate and detailed information about the layout and dimensions of existing structures, which is essential for effective energy efficiency consultancy. We collaborate closely with architects, engineers, and contractors to ensure that their designs not only meet all applicable requirements but also align with energy performance certificates and SAP calculations.
We provide professional U-value calculations for all types of construction as part of our Energy Efficiency Consultancy, including:
- External walls
- Roofs and lofts
- Ground and suspended floors
- Flat roofs
- Windows and doors
- Existing constructions
- Proposed and bespoke build-ups
Our calculations are completed using recognised industry methodologies, ensuring compliance with Energy Performance Certificates standards. These can be supplied as standalone reports or as part of a comprehensive SAP Calculations assessment package.
Part O of the Building Regulations was introduced to address the risk of overheating in residential buildings. As homes become more energy efficient and better insulated, there is an increased risk of excessive indoor temperatures during warmer weather. Part O aims to ensure that buildings are designed to maintain comfortable internal temperatures while reducing the need for mechanical cooling systems such as air conditioning, thus supporting overall energy efficiency.
Compliance with Part O is typically demonstrated through an assessment of factors including glazing areas, solar gains, ventilation strategies, building orientation, shading provisions, and local environmental conditions. This process is often part of our Energy Efficiency Consultancy services, where we help minimize overheating risk while maintaining energy performance and occupant comfort, including the necessary SAP Calculations.
For new-build dwellings and certain residential developments, achieving Part O compliance is a key requirement for Building Regulations approval. At EPC Sussex, we provide expert assessments and practical design advice to help developers, architects, and homeowners meet these regulations, ensuring properties remain comfortable, sustainable, and fit for future climate conditions while also obtaining Energy Performance Certificates.
Part G of the Building Regulations addresses essential aspects such as sanitation, hot water safety, water efficiency, and wholesome water supply within buildings. Designed to ensure that properties offer safe and adequate sanitary facilities, these regulations also promote the efficient use of water resources.
For new dwellings, Part G sets a maximum water consumption target of 125 litres per person per day, though some local authorities may enforce stricter thresholds of 110 litres per person per day. Compliance is confirmed through a Water Efficiency Calculation, which evaluates the water usage of sanitary fittings and appliances like toilets, taps, showers, baths, and white goods.
Additionally, Part G includes safety measures to protect occupants from scalding by mandating temperature controls on specific hot water outlets. At EPC Sussex, we specialize in Energy Efficiency Consultancy, offering Part G Water Efficiency Calculations and compliance advice to support developers, architects, and homeowners in meeting Building Regulations requirements. Our services not only assist in obtaining Building Control approval efficiently and cost-effectively but also encompass the generation of Energy Performance Certificates and SAP Calculations to enhance overall energy performance.
Whether you're a homeowner, landlord, developer, architect, or property professional, EPC Sussex Ltd is here to provide expert Energy Efficiency Consultancy. Every project is unique, so we offer tailored quotations that take your specific requirements into account. Our experienced team is ready to discuss your project, answer any questions, and guide you through the process, including obtaining Energy Performance Certificates and performing SAP Calculations, from start to finish.
Get in touch today for a free, no-obligation quotation and discover how EPC Sussex Ltd can help you achieve compliance, enhance energy performance, and keep your project moving forward.
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