Local energy, thriving communities.

Local energy engineering

Clear energy decisions, with technical rigour and a personal approach.

Energy certificates, grants and independent advice so you can move forward confidently, understand every step and always speak to the same engineer.

With the basic details, I can prepare an initial cost estimate.

Registered engineer Direct communication Independent advice

I work with

Homeowners and communities Architects and practices Public bodies and businesses

Arrel Energia services

Technical solutions to save energy and move forward with confidence.

Every commission starts by understanding what you need and ends with technical documentation you can understand and rely on.

Sale · Rental · Design · Completion

Energy performance certificates

Site visit, data collection, modelling, issue and registration. For new buildings, I work with architects at design and completion stages.

  • Homes, premises and buildings
  • Existing and new buildings
  • Clear improvement proposals
  • Follow-up to registered energy label
I need a certificate

Refurbishment · Efficiency · Grants

Energy refurbishment grants

I assess feasibility, prepare the technical documents and coordinate the application from submission to final justification.

  • Eligibility and feasibility
  • Initial and final certificates
  • Technical reports and evidence
  • Coordination with professionals and authorities
Review my project

Individual · Shared · Optimisation

Solar self-consumption advice

I analyse consumption and alternatives so system sizing responds to your real energy-saving and self-consumption goals.

  • Bills and consumption habits
  • Power, production and surplus
  • Individual and shared systems
  • Investment, savings and payback
Optimise my installation

Assessment · Evidence · Coordination

Energy Savings Certificates (CAE)

I assess whether an efficiency measure may generate Energy Savings Certificates and prepare the required technical evidence.

  • Identification of eligible measures
  • Energy savings evidence
  • Technical documentation
  • Coordination with CAE scheme participants
Assess an energy measure

Specialist experience

Next Generation Programme 4 in Barcelona

I prepare and follow Programme 4 applications before the Barcelona Housing Consortium: eligibility, certificates, technical reports, requests for further information and final justification.

See how I manage Programme 4
Time-limited callsI check the current status and eligibility of each case before starting an application.

How I work

An orderly process that builds confidence and avoids surprises.

You will speak directly to the engineer who reviews the case, carries out the visit, prepares the documents and follows its progress.

  1. Initial consultation

    I listen to your goal and review the available documents.

  2. Site visit and assessment

    I collect the necessary data and analyse realistic options.

  3. Documents and procedures

    I prepare, explain and submit the agreed documentation.

  4. Follow-up to completion

    I answer requests and support you until the contracted stage is closed.

Gemma Roigé Castellví, agricultural technical engineer and founder of Arrel Energia
Gemma Roigé CastellvíEnginyera Tècnica Agrícola

The person behind Arrel Energia

I’m Gemma, an agricultural technical engineer.

I combine local government experience with energy certification, refurbishment grants and renewable energy projects.

Arrel Energia offers a clear, rigorous and personal service: independent technical judgement, knowledge of public procedures and open communication so you can decide with confidence.

CETAFC registered engineer no. 5323 Master’s in Environmental Engineering Local government experience

Close to you

Local service in Camp de Tarragona. Applications across Catalonia.

Site visits and local services are mainly provided in Camp de Tarragona. For grants and technical procedures, I also work throughout Catalonia, including Programme 4 in Barcelona.

Mont-roig del CampMiami PlatjaReusTarragonaBarcelona · Programa 4Catalunya

Let’s discuss your project

Tell me what you need and we will identify the best way forward.

Tell me what type of property you have, where it is and what you want to do. I can then prepare an initial cost estimate and explain the next steps.

Direct contactYou will speak directly to the engineer reviewing your case.

Contact me directly, with no intermediary platforms or referral fees.