Electrical, Heating & Renewable Energy Experts
From full rewires to solar PV systems, efficient heating solutions to complete property builds — Jelvis delivers certified excellence across Chichester and West Sussex. We're NAPIT, MCS and TrustMark accredited, with over 6,000 projects completed by our in-house team.
Complete Property
Solutions
Four specialist divisions, one trusted team. Everything delivered in-house to the highest industry standards — no subcontractors, no compromises.
Electrical Services
Our NAPIT-certified electricians handle everything from complete domestic rewires and consumer unit upgrades to periodic testing, inspection and certification. We provide expert fault finding for complex electrical issues, new circuit installations, lighting design for homes and commercial properties, and 24-hour emergency callout cover across West Sussex. Every job is completed to BS 7671 wiring regulations with full certification provided.
NAPIT Certified
Heating Systems
We specialise in modern, energy-efficient heating solutions designed to reduce your energy bills. Our range includes sleek infrared heating panels, next-generation storage heaters, electric underfloor heating systems, and solar-integrated heating that works with your renewable energy setup. We'll survey your property, recommend the most cost-effective solution for your needs, and manage the full installation from start to finish.
Energy Efficient
Solar PV & Renewables
As MCS-accredited renewable energy installers, we design and fit bespoke solar PV systems tailored to your property and energy usage. Our services include high-efficiency solar panel installation, battery storage systems for energy independence, EV charger fitting for electric vehicles, and expert guidance on government grants and feed-in tariffs. Every installation starts with a free, no-obligation energy consultation and site survey.
MCS Accredited
Construction & Refurbishment
Our experienced construction division delivers full property refurbishments, new builds, renovations, extensions and loft conversions — all managed and completed by our in-house tradespeople. From initial design and planning through to handover, we coordinate every stage so you have a single point of contact. No subcontractors means consistent quality and clear accountability throughout your build.
All In-HouseBuilt on Trust,
Powered by Expertise
Founded in 2011, Jelvis started as a one-man electrical operation run by company director James Mayzes. What began with domestic rewires and small repairs in Chichester quickly grew through word-of-mouth recommendations and a reputation for doing things properly — first time, every time.
Today, Jelvis is a multi-disciplined team of qualified electricians, renewable energy specialists, heating engineers and construction professionals. Based at our offices on Fisher Lane in Chichester, we've now completed over 6,000 projects across West Sussex, Hampshire and Surrey — from single socket installations to full new-build developments.
What hasn't changed is our commitment to quality. Every project is delivered by our in-house team — no subcontractors, no shortcuts. That's how we maintain the standards and accountability our customers have come to rely on. We're proud to hold NAPIT, MCS, TrustMark and Checkatrade accreditations, and every member of our team is fully qualified, insured and DBS checked.
Meet the People
Behind Jelvis
Led by founder and director James Mayzes, the Jelvis team brings together qualified electricians, MCS-accredited solar installers, heating specialists and experienced construction tradespeople. Every team member is fully qualified, insured and DBS checked — and every project is managed directly by our leadership team to ensure the quality you expect.
We invest heavily in ongoing training and professional development, keeping our team at the forefront of industry standards, building regulations and the latest renewable energy technology. When you work with Jelvis, you're working with people who genuinely care about getting the job done right.
Qualified Tradespeople
Every team member holds relevant industry qualifications and certifications
DBS Checked
All staff are fully vetted and DBS checked for your peace of mind
Ongoing Training
Continuous professional development keeps skills current and sharp
Direct Management
Leadership team oversees every project from start to completion
Why Customers
Choose Us
Industry-certified, customer-approved, and built on over a decade of proven results across West Sussex.
Fully Certified
NAPIT, MCS, TrustMark, and Checkatrade accredited. Every job meets the highest industry standards with full certification and warranties provided.
100% In-House Team
No subcontractors, ever. Our qualified team handles everything from initial survey through to final sign-off for complete quality control and accountability.
24hr Emergency Callouts
Electrical emergencies don't wait — and neither do we. Our round-the-clock emergency callout service is available 365 days a year across West Sussex.
Free Consultations & Quotes
Every project starts with a no-obligation consultation. We'll visit your property, assess your needs and provide honest, transparent advice and a clear written quote.
Ready to Start
Your Project?
Whether it's a quick repair or a full property build, we'd love to hear from you. Free quotes, honest advice, no obligations. Call us directly or fill in the form below.