Bespoke Modular Building Extensions
SIPS Building Services
SIPS buildings and home extensions to garage conversions, garden rooms and complete new-build projects, HMJ provides professional building solutions tailored to your property, plans and budget.
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25+ Years Experience
500+ Projects Completed
Local Grantham Based
WHAT ARE SIPS?
Structural Insulated Panels (SIPs)
SIPs are high-performance building panels that combine structural strength with excellent thermal insulation. Manufactured off-site for precision and consistency, they are delivered to site ready for fast, efficient installation.
Excellent thermal performance
Faster construction on site
Excellent air tightness
Stronger, lighter & more durable
Reduced heat loss & energy bills
Sustainable & efficient
Energy Efficient
High levels of insulation create comfortable, energy-efficient buildings.
More Usable Space
Slim panel construction helps maximise internal floor space.
WHY CHOOSE SIPS?
Built Better With SIPS
Faster Construction
Off-site manufacturing reduces build timescales significantly.
Sustainable Choice
Reduced waste, improved efficiency and a lower environmental impact.
Strong & Durable
Engineered for structural strength and long-term performance.
Excellent Airtightness
Helps reduce draughts and improves overall thermal performance.
Home Extensions
From bespoke modular building extensions to garage conversions, garden rooms and complete new-build projects, HMJ provides professional building solutions tailored to your property.
Commercial Buildings
SIPS solutions for offices, retail, industrial and larger-scale projects.
WHAT WE BUILD
SIPS for bespoke modular building extensions
New Builds
Complete structural solutions for energy-efficient new build homes.
Garden Rooms
Beautiful, insulated garden spaces for work, relaxation or entertainment.
Community & Education
Schools, church halls, classrooms and community buildings built with SIPS.
Garage Remodelling
Transform your garage into a comfortable, valuable living space.
Choose The Right Service For Your Project
OUR SIPS SERVICES
Home Extensions
From initial ideas and planning through to construction and completion. We manage the entire process for you.
Supply & Fit
We supply Structural Insulated Panels and professionally install them on-site.
Fit Only
Already have materials and plans? We offer an expert on-site SIPS erection service.
From Concept To Completion
From your initial consultation through to final construction, we keep the SIPS building process clear, organised and straightforward. Our team supports you at every stage, from planning and accurate costing to material preparation and professional installation. The result is a smoother build with better coordination, fewer delays and a high-quality finished structure.
01 — Consultation & Planning
We discuss your ideas, assess the site and develop the plans and technical requirements for your project.
02 — Quotation & Preparation
We prepare a detailed quotation, confirm the scope of work and organise the required SIPS panels and materials.
03 — Construction & Completion
Our experienced team installs the SIPS structure, manages the construction process and completes the project to a high standard.