XLR8 Case Study

Raglan Road — High-End Residential MEP Design & Compliance

Reigate, Surrey

Project Overview

XLR8 MEP Design Ltd was appointed to deliver full Mechanical, Electrical and Plumbing (MEP) design services for a new-build three-storey residential dwelling at Raglan Road, Reigate.

The project required a fully coordinated MEP design package, including energy and overheating compliance, to support planning, tender, and construction stages.

Client Requirement

The client required a complete MEP design solution to:

• Support a high-end residential new build
• Provide coordinated Stage 4 technical design for contractor pricing
• Ensure compliance with Building Regulations Part L (energy) and Part O (overheating)
• Integrate modern heating and cooling strategies within the dwelling

Scope of Services

XLR8 MEP Design Ltd provided a full pre-construction design package, including:

• Utility load calculations and coordination
• Full mechanical and electrical design calculations
• Production of Stage 4 technical design drawings
• Technical specifications for plant and equipment
• Tender documentation to support contractor procurement

In addition, the design package included:

• Part L SAP calculations to demonstrate energy compliance
• Part O overheating assessments to assess internal comfort and solar gain risk

MEP Design Strategy

The scheme incorporated a fully integrated residential services design, including:

• Low temperature hot water (LTHW) heating system
• Underfloor heating distribution across multiple zones
• Air source heat pump integration
• Domestic hot water generation and storage
• Mechanical ventilation strategy
• Full electrical power and lighting design

The coordinated plantroom layout and system arrangement ensured a practical and buildable installation aligned with the architectural layout.

Technical Coordination

A key element of the project was detailed coordination of:

• Plantroom layout and service routes
• Underfloor heating zoning and distribution
• Vertical and horizontal service integration across all floors

The first floor layout demonstrates coordinated multi-zone underfloor heating distribution, aligned with room layouts and thermal zoning strategy.

Key Challenges

• Integrating modern low-carbon systems within a residential layout
• Coordinating multiple services within limited plant and ceiling space
• Achieving compliance with both energy (Part L) and overheating (Part O) requirements
• Producing a design that is both technically robust and tender-ready

Our Approach

XLR8 adopted a practical, coordination-led design approach, focusing on:

• Early-stage compliance modelling (Part L & Part O)
• Clear zoning and system layout for heating and cooling
• Coordinated drawings to reduce installation risk
• Providing contractors with clear, buildable information

Outcome

XLR8 MEP Design Ltd delivered a complete and coordinated design package which:

• Enabled accurate contractor pricing
• Demonstrated compliance with Building Regulations
• Provided a clear pathway from design through to installation
• Reduced coordination risk during construction

Project Value

This project demonstrates XLR8’s ability to deliver fully integrated residential MEP design, combining:

Technical design, regulatory compliance, and practical coordination — ensuring projects are buildable, compliant, and ready for delivery.

Planning a Similar Development?

If you are developing a high-end residential property and require MEP design, SAP compliance, or overheating analysis, XLR8 MEP Design Ltd can provide structured, professional support.

Contact us to discuss your project

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