S I Sealy
- Company typePrivate
- Founded1951
- HeadquartersBredbury, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
S I Sealy firmographics
Firmographics- Name
- S I Sealy
- Legal name
- SI Sealy Limited
- Website
- https://sisealy.co.uk
- Company type
- Private
- Founded year
- 1951
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Ownership category
- akta.pro rank
Where S I Sealy is headquartered
LocationHeadquarters
- HQ city
- Bredbury
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
S I Sealy business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Professional Engineering Consultancy Services: S I Sealy generates revenue through providing specialist building services engineering design consultancy services on a project basis. Services include mechanical and electrical design, digital design, building energy modelling, sustainability assessments, and BIM coordination. Revenue is earned through fees for design services, surveys, reports, and ongoing advisory work across various project types and sectors.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels6 records
S I Sealy product offering
Product offeringCore offering
S I Sealy is a specialist building services engineering design consultancy delivering mechanical, electrical, and public health (MEP) design, digital engineering design via MagiCAD within Autodesk Revit, Building Information Modelling (BIM) coordination, building and energy modelling, modern methods of construction (MMC) design, building surveys and reports, and sustainability/net zero carbon consultancy through its Net Zero UK division, primarily for NHS, public sector, education, heritage, and commercial clients in the UK.
Product overview
S I Sealy is a specialist building services engineering design consultancy providing MEP (mechanical, electrical, and public health) engineering services alongside sustainability and decarbonisation consulting. The company operates as a unified consultancy with distinct but integrated service streams: core building services engineering design, digital design using MagiCAD and Revit, building & energy modelling, BIM services, modern methods of construction, and surveys & reports. The company also operates a specialist sustainability division called Net Zero UK, which delivers decarbonisation studies, renewable energy strategies, and net zero carbon planning. Services are delivered across all building sectors including healthcare, education, commercial, heritage, retail, leisure, and public sector.
Differentiator
Problem solved
Functional benefit
Brands
- Net Zero UK: Specialist decarbonisation division providing sustainability engineering services, low carbon strategies, and net zero carbon solutions for clients.
Quantifiable outcome
- Achieved 80% reduction in operational carbon emissions within residential areas for Benabo Court development
- +4 more outcomes
Companies that use S I Sealy
Customer profileNamed customers17 records
Segments6 records
Ideal customer profiles5 records
S I Sealy technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
S I Sealy partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Net Zero UKcoreNet Zero UK is S I Sealy's specialist sustainability division focused on decarbonisation services. The division provides comprehensive sustainability engineering services including low carbon strategies, energy modelling, and Net Zero carbon coordination for projects across healthcare, education, and public sector clients. The division supports the parent company's ability to deliver ambitious, environmentally responsible projects.
Scale indicators5 records
Recent moves7 records
Expansion highlights5 records
S I Sealy competitors and assessment
Company assessmentDirect peers
- Hoare Lea: UK-headquartered building services engineering design consultancy with deep MEP, sustainability and digital engineering expertise serving healthcare, education, heritage and commercial sectors - the closest direct UK analogue to S I Sealy, but at materially larger scale.
- Pick Everard: UK building and engineering consultancy providing MEP design, surveying and project services to public sector, healthcare and education clients - direct competitor on the same framework ecosystem and sector mix.
- Cundall: Multi-disciplinary engineering consultancy with a strong building services, sustainability and BIM offering across the UK and internationally - closely comparable on service mix and sector focus, including healthcare and education.
- Max Fordham: Employee-owned building services engineering consultancy renowned for sustainability-led MEP design in heritage, education and cultural buildings - highly comparable to S I Sealy on owner-led culture and sustainability positioning.
- Ridge and Partners: Multidisciplinary property and construction consultancy offering building services engineering, project management and surveying across public and private sectors - comparable on service breadth and client base.
- Hilson Moran: Specialist UK building services and sustainability engineering consultancy serving commercial, healthcare and public sector clients - a like-for-like peer on the core MEP design and decarbonisation value proposition.
Broad incumbents
- Arup: Global engineering consultancy with deep UK building services, sustainability and heritage expertise - operates as a much larger incumbent across the same NHS, education and heritage sectors.
- BDP (Building Design Partnership): Major international architecture and engineering practice with integrated building services engineering, healthcare and education sector expertise - a much larger incumbent competing for the same NHS and university frameworks.
- WSP: Global professional services firm with a substantial UK building services engineering practice serving healthcare, public sector and commercial clients - competes against S I Sealy on larger national framework mandates.
Regional players
- Hydrock (now Stantec): UK-origin building services and sustainability engineering consultancy, recently acquired by Stantec, with comparable sector focus on healthcare, education and public sector - regional player transitioning into a global platform.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
S I Sealy social profiles
Digital presenceS I Sealy compliance and trust
Trust signalCompliance3 records
S I Sealy financial estimates
Financial estimateRevenue estimate
Valuation estimate
S I Sealy leadership team
Management profileNumber of profiles
S I Sealy funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
S I Sealy M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about S I Sealy
What does S I Sealy do?
S I Sealy is a specialist building services engineering design consultancy delivering mechanical, electrical, and public health (MEP) design, digital engineering design via MagiCAD within Autodesk Revit, Building Information Modelling (BIM) coordination, building and energy modelling, modern methods of construction (MMC) design, building surveys and reports, and sustainability/net zero carbon consultancy through its Net Zero UK division, primarily for NHS, public sector, education, heritage, and commercial clients in the UK.
Is S I Sealy a public or private company?
S I Sealy is a private company. It is currently operating.
When was S I Sealy founded?
S I Sealy was founded in 1951. It employs 11 to 50 people.
Where is S I Sealy based?
S I Sealy is headquartered in Bredbury, United Kingdom, in the Europe region.
How does S I Sealy make money?
One revenue line is on record: professional Engineering Consultancy Services.
Who are S I Sealy's main competitors?
Direct peers on record are Hoare Lea, Pick Everard, Cundall, Max Fordham, Ridge and Partners and Hilson Moran. Broad incumbents are Arup, BDP (Building Design Partnership) and WSP. Hydrock (now Stantec) is listed as a regional player.
Does S I Sealy have an API?
No public API is recorded for S I Sealy.