Decarbonisation and retrofit services

Est. 1991.

Supporting public sector, residential and commercial clients with energy efficiency retrofit, decarbonisation programmes and low carbon construction.

The majority of buildings that will be in use by 2050 are already standing today. Improving and adapting what we have is central to reaching net zero, reducing carbon, extending building life and maintaining value.

Sinden delivers decarbonisation and retrofit programmes across occupied public and private sector buildings, schools, healthcare facilities and residential buildings across London and the South East.

Sustainability is integrated into our delivery from the outset, covering whole-life carbon assessment, embodied carbon reduction, energy efficiency improvement and material reuse.

We work closely with client teams, sustainability consultants and design teams to provide clarity on what is achievable and deliver measurable outcomes on every project.

Silbury House, recognised as the most sustainable building in Milton Keynes, with a BREEAM Outstanding rating

Quadrant House, shortlisted for the Architect’s Journal Retrofit & Reuse Awards across three categories

A decarbonisation contractor, integrating carbon reduction and energy efficiency into every project.

Bringing retrofit capability and cross-sector construction experience to decarbonisation programmes across London and the South East.

Experienced in retrofit delivery

Sinden has the experience of delivering energy efficiency improvement programmes across public sector, private sector and residential buildings, giving clients the assurance that retrofit works meet the required standard.

Whole-life carbon thinking built into every project

We consider embodied carbon, operational performance and material reuse at feasibility stage, supporting clients in making design and procurement decisions that drive real, measurable carbon reduction.

Decarbonisation across occupied public and private sector buildings

Our experience delivering in live schools, offices, healthcare facilities and community buildings means we can plan and sequence decarbonisation programmes around operational needs, keeping buildings running and people comfortable throughout.

Social value alongside environmental impact

Every project we deliver creates lasting value beyond the building, through local employment, apprenticeships, supply chain spend and community engagement that supports the areas we work in.

Featured Decarbonisation & Sustainability projects

Silbury House

Creating the most sustainable building in Milton Keynes

Quadrant House

Transforming a prominent town-centre building into a sustainable, energy-efficient asset for Tandridge District Council

View all projects

What our clients say about working with us

David Kershaw

Silbury House

"Sinden demonstrated a genuine commitment to sustainability throughout the refurbishment of Silbury House, taking a proactive and collaborative approach from the outset. Working closely with our consultant team, they played an important role in elevating the project from the original BREEAM Excellent target to achieving BREEAM Outstanding. This included a collaborative leadership approach to whole life carbon assessment, embodied carbon reduction, material reuse and improvements in operational energy performance. Their willingness to challenge, innovate and propose practical solutions resulted in measurable carbon savings and a building that exceeds industry benchmarks while maintaining quality, programme and occupier comfort."

David Kershaw

Silbury House