Castaño & Asociados Passivhaus

What Castaño & Asociados Passivhaus does

Castaño & Asociados Passivhaus is a Seville-based architecture, engineering, and Passivhaus consulting firm founded in 2015 that operates from three offices in Seville (HQ), Budapest, and Málaga with a multidisciplinary team of 15. The firm sells three integrated service lines: (1) Passivhaus consulting and certification, including energy simulation using PHPP, thermal bridge calculation, Blower Door airtightness testing, and component certification; (2) full architecture and engineering services for hotels, schools, sports facilities, offices, medical centers, and residential projects delivered to Passivhaus, LEED, and BREEAM standards; and (3) official PHI-accredited training courses (Certified Passivhaus Designer, Certified Passivhaus Tradesperson, and workshops on Design PH and PHPP), which it delivers both online and in-person across Spain, Europe, and LATAM. The firm is the only PHI-accredited training provider in Southern Spain and holds notable firsts in the warm-climate Passivhaus category, including the first Passivhaus Premium certification in Southern Spain (Villa Suasana, 2021) and the first Passivhaus-certified window frame for warm climates worldwide (EUROTORR92).

The firm derives revenue from professional services fees on consulting projects, certification engagements, and training course tuition (€320–€1,200 per course), with corporate in-house training programs (e.g., FCC, Technal) supplementing the open-enrollment book. It serves architects, developers, construction companies, construction product manufacturers, and government entities, with a separate international division delivering engineering services for US government projects under American standards (UFC, NFPA, ASHRAE, NEC). The customer mix is weighted toward enterprise project work complemented by distributed training volume, with pricing structured per course and per project rather than on subscription. The business is founder-owned, with leadership holding both Passivhaus Designer and Trainer certifications, and operates without external funding or institutional investors.

Name

Castaño & Asociados Passivhaus

Legal name

Castaño y Asociados Construccion Sostenible S.L.

Website

https://castanoyasociados.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Castaño & Asociados Passivhaus is a Seville-based architecture and engineering firm specializing in Passivhaus design, certification, and consulting for warm climates. It serves architects, developers, construction firms, manufacturers, and government clients through consulting, project delivery, and PHI-accredited training.

Ownership category

akta.pro rank

Product category

Passivhaus Architecture and Energy Consulting Services

NAICS

Architectural, Engineering, and Related Services (5413), Architectural Services (541310)

SIC

Services-Engineering Services (8711)

akta.pro industry

PRIMARYEDAOACAM

Building Performance, Energy Auditing & HVAC Efficiency

Education/Vocational, Technical & Trade Education/Plumbing, HVAC & Refrigeration Trades

SECONDARYIMAIACAF

Insulation, Scaffolding & Access Services (ISA)

Industrials, Manufacturing & Construction/Industrial Services & Facility Operations/Industrial Maintenance & Plant Shutdown Services

Keywords

• Passivhaus consulting
• Building energy certification
• Passive house training
• Sustainable architecture services
• Thermal simulation consulting

Headquarters

HQ city

Sevilla

HQ country

Spain

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Passivhaus Consulting Services: Energy advisory and project follow-up for Passivhaus certification of buildings, including thermal simulation, thermal bridge calculations, construction development, and hermeticity testing services.
2. Official Passivhaus Training Courses: Revenue from certified Passivhaus Designer and Tradesperson courses, practical workshops (PHPP, Design PH), and customized corporate training programs. Courses are accredited by Passive House Institute and Platforma de Edificación Passivhaus.
3. Passivhaus Certification Services: Quality control and certification services for Passivhaus buildings and construction components, including consulting on certification process for designers and tradespeople.
4. Architecture and Engineering Services: Full-service architecture and engineering design services including project management, turnkey projects, and Passivhaus-compliant building design for various building types.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

Castaño & Asociados Passivhaus is a Seville-based architecture, engineering, and Passivhaus consulting firm that delivers Passivhaus-certified building design, energy consulting, thermal simulation, airtightness testing, and component certification. It also runs official PHI-accredited Passivhaus training courses (Designer and Tradesperson) and offers LEED/BREEAM certification support, with an international division serving US government projects.

Product overview

Castaño & Asociados Passivhaus is a specialized architecture, engineering, and Passivhaus consulting firm based in Seville, Spain, operating across southern Spain with additional offices in Budapest and Málaga. The company offers an integrated portfolio organized into three core pillars: (1) Passivhaus Consulting & Certification — advisory services for Passivhaus certification including thermal simulation (PHPP), airtightness testing (Blower Door), thermal bridge calculation, component certification, and installation design; (2) Architecture & Engineering — project management and turnkey Passivhaus delivery for residential, hospitality, educational, and public buildings; and (3) Passivhaus Training — a suite of official certified courses accredited by the Passivhaus Institut and the Plataforma de Edificación Passivhaus (PEP), including the Certified Passivhaus Designer course, Certified Passivhaus Tradesperson course, Design PH + PHPP export workshop, PHPP10 practical workshop, online Passivhaus workshops, and customized in-house training for enterprises. The company also provides LEED and BREEAM certification support, and operates an international division serving US government entities with specialized engineering services under American standards. Its training uses official PHI materials with a strong focus on warm climates and is available online (100% streaming) and in-person. The company has certified landmark projects including Villa Suasana (the first Passivhaus Premium in southern Spain), The Wave House in Mijas, and the first Passivhaus-certified window for warm climates (EUROTORR92).

Differentiator

Problem solved

Functional benefit

Products and services

• Passivhaus Consulting (Consultoría Passivhaus) Advisory and consulting services for Passivhaus certification, including energy audits, thermal simulation with PHPP, thermal bridge calculation, airtightness/Blower Door testing, Passivhaus component certification, and installation design for architects, developers, and construction companies.
• Architecture and Engineering (Arquitectura e Ingeniería) Full-service architecture and engineering design services including project management and turnkey solutions for Passivhaus buildings such as hotels, schools, sports centers, offices, medical centers, and residential projects.
• Certified Passivhaus Designer Course Official certified training course for Passivhaus design, planning, and calculation of Nearly Zero Energy Buildings under the Passivhaus standard, using official PHPP software and Design PH, accredited by the Passivhaus Institut and PEP. Available online and in-person.
• Certified Passivhaus Tradesperson Course Official certified training course for construction professionals on Passivhaus building execution, covering windows, insulation, airtightness, SATE systems, ventilation, and Blower Door testing. Available online and in-person.
• Design PH + Export PHPP Practical Course Practical workshop teaching professionals to use Design PH (SketchUp plugin) for graphical Passivhaus design and export data to PHPP for complete energy simulation, earning 10 continuing education credits.
• PHPP10 Practical Workshop Practical workshop for Passivhaus designers to perform complete energy simulation of a single-family home using PHPP10 (Passive House Planning Package), earning 18 continuing education credits over 13.5 hours across 3 sessions.
• Online Practical Passivhaus Workshops Online practical workshops covering the five pillars of the Passivhaus standard — insulation, high-performance windows, airtightness, thermal bridge–free design, and mechanical ventilation with heat recovery — plus a workshop on the first Passivhaus Premium building in southern Spain.
• In-Company Passivhaus Training Customized in-house Passivhaus training for construction companies, tailored to specific company needs and delivered at the company's premises or online.
• Passivhaus Certification Services Official Passivhaus certification services for buildings (Classic, Plus, Premium levels) and EnerPHit for retrofits, as well as certification of construction components, conducted by recognized Passivhaus certifiers from the Passivhaus Institut.
• LEED – BREEAM Certification Support Energy advisory and certification support for LEED and BREEAM sustainability certifications, with qualified technicians for LEED commissioning services.
• International – USA Engineering Services International architecture and engineering consulting services for US government entities, covering civil works, structural engineering, fire protection (NFPA), HVAC (ASHRAE), electrical systems (NEC/NFPA 70), and quality control management under US government standards.
• Construction Component Certification Detailed studies and certification services for construction components (windows, doors, and building systems) to obtain Passivhaus component certification, enabling their use and commercialization in certified Passivhaus buildings worldwide.

Quantifiable outcome

• 75% reduction in heating and cooling demand compared to conventional buildings
• +5 more outcomes

Named customers10 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered core, support and minor.

• Passive House Institute (PHI)coreStrategic or Co-development PartnerOfficial accreditation as Course Provider for Certified Passivhaus Designer and Tradesperson courses. Access to official PHI materials, examination authority, and recognition as certified training organization. Exclusive position as only PHI-accredited training provider in Southern Spain.
• Plataforma de Edificación Passivhaus (PEP)coreStrategic or Co-development PartnerCo-accreditation with PEP for official Passivhaus training courses in Spain. Collaboration on course organization, access to PHPP licenses at discounted rates (10% for Castaño students), and recognition within Spanish Passivhaus community.
• Fundae (Fundación Estatal para la Formación en el Empleo)supportOthersSpanish government training foundation enabling 600€ funding subsidies for workers taking Passivhaus courses through Castaño & Asociados. Microcredit program for professional training.
• Cluster de la Construcción Sostenible de AndalucíaminorStrategic or Co-development PartnerCo-organizer of Passivhaus training courses in Andalusia. Sustainable construction industry association supporting training initiatives and professional development in the region.
• Professional Architecture and Engineering AssociationsminorGTM or Marketing PartnerCourses co-organized with professional associations including architects' associations and technical architects' associations (Colegio de Arquitectos, Colegio de Aparejadores), lending credibility and facilitating professional development credits.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Buro Happold: Global engineering consultancy with a strong sustainability and building performance practice. Comparable as a multidisciplinary engineering firm serving developers and architects on high-performance building projects at scale.
• ARUP: Global engineering and design consultancy with deep sustainability, building physics, and energy modeling capabilities. Comparable as a high-end engineering services firm consulted on complex, performance-driven building projects.
• Werner Sobek Group: German engineering and architecture firm specializing in sustainable, energy-efficient building design. Comparable as a high-design, high-engineering consultancy with deep expertise in energy performance and net-zero construction.
• Passive House Institute (PHI): The global standard-setting body for Passivhaus. Castaño & Asociados is an accredited training provider under PHI; PHI sets the certification rules, exam content, and methodology that the firm applies. Comparable as the source-of-truth authority in the same standard.

Others

• STO SE & Co. KGaA: European manufacturer of façade and insulation systems widely used in Passivhaus construction. Comparable as an adjacent ecosystem participant — its products are routinely specified and certified by Castaño on Passivhaus projects.
• Green Building Council Espa\u00f1a (GBCE): Spanish member of the global LEED/GBC network promoting sustainable building certification. Comparable as the broader Spanish sustainability ecosystem organization; Castaño offers LEED/BREEAM services that overlap with GBCE's remit.
• Pro Clima (Moll bau\u00f6kologische Produkte GmbH): German manufacturer of high-performance airtightness and weather-barrier systems for Passivhaus buildings. Comparable as a component supplier whose products are routinely certified and installed in Passivhaus projects Castaño consults on.

Direct peers

• Elementa Consulting: US-based MEP and sustainability consulting firm providing energy modeling, commissioning, and LEED/Passivhaus-adjacent services. Comparable as a building performance consulting firm serving architects and developers on energy-driven projects.
• Plataforma de Edificaci\u00f3n Passivhaus (PEP): Spanish Passivhaus platform that co-accredits Castaño's training courses and promotes Passivhaus adoption in Spain. Directly comparable as a Spanish-language Passivhaus ecosystem organization with overlapping mission in training and certification advocacy.
• Ecopassive: Spanish Passivhaus consulting and training firm offering similar PHI-aligned designer/tradesperson courses and project consulting. Directly competes for the same Spanish/LATAM trainee pool and consulting engagements.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/castano_asoc
• Facebookfacebook.com/castanoasociados
• LinkedInlinkedin.com/company/castano-y-asociados
• Instagraminstagram.com/castanoasociados

Revenue estimate

Valuation estimate

Number of profiles

Profiles16 records

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 Castaño & Asociados Passivhaus