Our Services
Sustainability Consultancy Services
At RedSix, we provide industry-leading sustainability consultancy across the full lifecycle of the built environment, from early planning to long-term operation. Whether you’re shaping a concept or managing an occupied asset, our team of accredited professionals delivers the insight, technical expertise, and compliance support you need to meet today’s environmental standards and tomorrow’s ambitions.
Our services are tailored to unlock environmental performance, reduce carbon emissions and deliver measurable value at every phase of a project.
Planning
We support developers, planners and design teams during early feasibility and pre-application phases with compliant documentation that supports planning approvals and sets the tone for a low-carbon build.
Design
Embedding sustainability into your design from the outset is key to long-term performance. We work closely with architects, engineers and consultants to provide design-stage calculations, certification pathways and modelling.
Construction
As your project moves onsite, we provide practical, hands-on consultancy to coordinate sustainability requirements, liaise with contractors, and ensure that targets set during planning and design are delivered.
Operation
Our support doesn’t end when construction does. We offer post-occupancy services to measure, verify and enhance the ongoing performance of your building. We also provide on-going CPD's & ESG services.
Our Services

2D & 3D PSI Calculations

AECB CarbonLite New Build

Asset Decarbonisation Plans

BB101 Overheating Analysis

BREEAM Accredited Professional

BREEAM Assessment

BREEAM Co-ordination

BREEAM In Use

BREEAM In Use – Built

BREEAM Residential

Carbon Literacy Training

CIBSE TM52 Overheating Analysis

CIBSE TM54 Operational Carbon

CIBSE TM59 Overheating Analysis

Circular Economy Assessment

Climate Change and Sustainability Chapter

Embodied Carbon

Embodied Carbon Roadmap

Energy & Carbon Audits

Energy Performance Certificates

Energy Performance Certificates – Built

Energy Statements

Fitwel Certification

GRESB Reporting

LFI Living Building Challenge

LFI Net Zero Carbon Certification

Life Cycle Assessment Analysis

MEES Audits and Action Plans

Operational Carbon Post-Occupancy Monitoring

PAS 2035

SAP Calculations

SBEM Calculations

Sustainability Strategies

WELL Certification
