SEES Ltd

What SEES Ltd does

SEES Ltd (legal entity Sadler Energy and Environmental Services Ltd, company number 6548294) is a UK-based specialist consultancy delivering energy, sustainability, and building regulation compliance assessments, testing, and certification services for residential and commercial construction projects. Founded in 2007 by Naomi Sadler and incorporated as a limited company in 2008, the firm is headquartered in Durley, Southampton (Unit 5 Mill Court, The Sawmills, SO32 2EJ) with a registered office in Chichester (Drayton House, Drayton Lane, PO20 2EW). Its portfolio spans the full compliance lifecycle: BREEAM assessment (New Construction, Refurbishment & Fit Out, Bespoke, Residential), SAP calculations (including Conversions, Extensions, and RdSAP), SBEM modelling with BRUKL and DEC outputs, air tightness testing (domestic, commercial, and Passivhaus), overheating analysis using CIBSE TM59/TM52, thermal bridging (Psi/Chi values), daylight calculations, Building Carbon Assessment (LCA and Whole Life Carbon to BS EN 15978 and RICS), Water Efficiency and Water Neutrality, Energy Strategy, Indoor Air Quality, Thermographics, and Building User Guide/O&M Manual production.

Service delivery is enabled by qualified assessors using industry-standard third-party platforms — IES Dynamic Simulation Modelling and IES TaP for thermal modelling, DesignBuilder for SBEM, Physibel Trisco for 2D/3D thermal bridges, and One Click LCA for carbon assessments. The firm holds BREEAM Licensed Assessor Company status, ATTMA accreditation (membership Nos. 1225 and 1565), Elmhurst Energy Approved Energy Assessor status, Stroma certification, and Constructionline Gold membership. It claims BREEAM-qualified assessors since 2005 and over 20 years of energy calculation experience.

The business operates a fee-for-service professional consultancy model, generating revenue through project-based engagements booked via phone (01962 718870), email ([email protected]), or an Outlook Office 365 online booking system. Payment is required upfront for new customers unless otherwise agreed. The customer base spans UK national house builders (Persimmon, Taylor Wimpey, Barratt, Berkeley, Cala, Lovell, Countryside, Crest Nicholson), housing associations and councils (Raven, Hyde, L&Q, RHB), architects and design teams (Lewis & Hickey, Malachy Walsh & Partners), commercial developers (Parsons Construction, BRiCS Development, Gunwharf Quays, CIT), and individual homeowners requiring EPCs, RdSAP, retrofit assessments, and air tests. The firm is founder-owned with no disclosed external investors, funding rounds, M&A activity, or parent company structure.

Name

SEES Ltd

Legal name

Sadler Energy and Environmental Services Ltd

Website

https://sees.co.uk

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

1–10 employees

Short description

SEES Ltd is a UK-based specialist consultancy providing energy, sustainability, and building regulation compliance assessments, air testing, and BREEAM certification for residential and commercial projects, serving national house builders, housing associations, architects, and property owners.

Ownership category

akta.pro rank

Product category

Building Energy & Sustainability Consultancy

NAICS

Engineering Services (541330)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Audit-Ready Controls, Assurance & Compliance Workflow Tools (CSRD/SEC/ISSB) (EUABAEAG)

akta.pro secondary industry

Benchmarking, Ratings & Stakeholder Reporting Portals (Scorecards, Dashboards) (EUABAEAJ)

Keywords

• Building regulations compliance
• Energy performance assessments
• Sustainability consultancy
• BREEAM assessment services
• SAP calculations

Headquarters

HQ city

Durley

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Professional Services Consultancy: SEES generates revenue through fee-for-service professional consultancy engagements covering energy assessments, air tightness testing, BREEAM certification, and related building compliance services. Services are booked via phone, email, or online booking system. Payment is required upfront for new customers unless agreed otherwise.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels8 records

Core offering

SEES Ltd (Sadler Energy and Environmental Services Ltd) is a UK-based consultancy that provides building regulation compliance, energy performance, and sustainability assessment services. The firm delivers SAP calculations, BREEAM assessments, air leakage testing, thermal bridging calculations, EPCs, and environmental consultancy for residential and commercial construction projects.

Product overview

SEES Ltd operates as a specialist consultancy offering a unified portfolio of building regulation compliance, energy assessment, and environmental sustainability services. The core offering comprises BREEAM Assessment and Building Carbon Assessment (encompassing Life Cycle Assessment and Whole Life Carbon Assessment) as foundational sustainability frameworks. Supporting these are technical assessment services including Overheating Assessment (using dynamic thermal modelling), Thermal Bridging Calculations, and Daylight Calculations (with Internal and External sub-services). Energy compliance is addressed through SAP services (encompassing SAP for Conversions, SAP for Extensions, and RdSAP for existing buildings), SBEM services (covering Commercial New Builds, Commercial Existing Buildings, and Display Energy Certificates), Air Testing (Domestic, Commercial, and Ventilation), Water Efficiency Calculations, Water Neutrality Assessment, Energy Strategy, Indoor Air Quality Assessment, and Thermographics. Completing the portfolio are Building User Guide and O&M Manual documentation services. All services are delivered by qualified assessors using industry-standard software including DesignBuilder, IES, and Physibel Trisco.

Differentiator

Problem solved

Functional benefit

Products and services

• SAP Calculations
• BREEAM Assessments
• Air Leakage Testing
• Thermal Bridging Calculations
• Energy Performance Certificates (EPCs)
• Environmental Consultancy

Quantifiable outcome

• Achieved BREEAM Excellent rating for East Horton Business Park Building A (Fair Oak) — a 3-storey, 16,780 sq. ft. office building with EPC rating A for all four units.
• +3 more outcomes

Named customers19 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered core.

• ATTMA (Air Tightness Testing and Measurement Association)coreOthersSEES is an accredited member of ATTMA for air tightness testing services. Dave Thompsett holds ATTMA membership number 1225 at both Level 1 and Level 2, and Naomi Sadler holds ATTMA number 1565 at Level 1.
• BREEAMcoreOthersSEES is a BREEAM Licensed Assessor Company, offering BREEAM assessment services across New Construction, Refurbishment & Fit Out, Bespoke, and Residential schemes.
• Elmhurst EnergycoreOthersSEES operates as an Elmhurst Energy Approved Energy Assessor for producing EPCs and energy assessments.
• Stroma CertifiedcoreOthersSEES holds Stroma certification for building compliance and energy assessment services.
• IES (Integrated Environmental Solutions)coreTechnology or IntegrationSEES uses IES software including IES TaP for thermal and energy modelling, and IES VE for dynamic simulation modelling. IES TaP logo is displayed as an association/certification.
• DesignBuilder SoftwarecoreTechnology or IntegrationSEES uses DesignBuilder Software for building energy modelling and SBEM calculations. The DesignBuilder logo is displayed as a partner association.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• AECOM: Global engineering and sustainability consultancy with significant UK presence providing building physics, BREEAM, energy modelling, and sustainability advisory services. Competes for large national house builder mandates at the enterprise end of the market.
• Carbon Trust: Established UK organisation advising businesses and governments on carbon reduction, energy efficiency, and sustainability strategy. Operates at a broader scale than SEES, with overlapping capabilities in building-level carbon assessment and Whole Life Carbon.
• Buro Happold: International engineering consultancy with UK building performance and sustainability teams delivering energy modelling, BREEAM, and environmental assessments. Comparable technical depth in building physics and sustainability consulting for major UK developments.
• Sweco UK: European engineering consultancy with UK presence offering building services, sustainability, and energy consultancy to residential and commercial clients. Competes in Part L compliance, BREEAM, and carbon advisory for national house builders.
• Arup: Global engineering consultancy with deep UK sustainability and building physics practice, providing BREEAM, energy strategy, and carbon advisory to developers. Comparable in regulatory expertise and Whole Life Carbon capability, but at materially larger scale.
• WSP: Global professional services firm with a UK building services and sustainability practice offering energy assessments, BREEAM, and building regulation advisory. Overlaps with SEES in Part L, BREEAM, and embodied carbon work for large residential and commercial schemes.

Direct peers

• Calfordseaden: UK building consultancy offering building regulation, BREEAM, energy, and sustainability services to residential and commercial developers. Comparable mid-market competitor with overlapping Part L, BREEAM, and sustainability advisory services.
• Elmhurst Energy: Major UK accreditation body and energy assessment services provider for EPCs, SAP, RdSAP, and air testing. Directly comparable to SEES as a competitor and accreditation counterpart for energy assessors serving the UK residential market.
• Stroma: UK building compliance and energy assessment consultancy offering SAP, SBEM, EPC, BREEAM, air testing, and retrofit coordination services to house builders, developers, and homeowners. Direct overlap with SEES's core service portfolio and accreditation profile.
• Bailey Partnership: UK building services and sustainability consultancy providing energy assessments, BREEAM, and building regulation compliance. Comparable in scale and service mix, serving house builders and developers across the South of England.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xfacebook.com/sadlerenergy
• YouTubeyoutube.com/@seesltd4201
• Facebookfacebook.com/sadlerenergy
• LinkedInlinkedin.com/company/seesltd
• Instagraminstagram.com/seesltd

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SEES Ltd