Frequently Asked Questions

Many home extensions fall under permitted development, meaning planning permission may not be required. However, this depends on the size, design, and location of your property. Areas such as St Albans and Hitchin may have stricter rules, especially in conservation zones. We guide you through the entire process to ensure compliance.

The cost of a home extension varies depending on size, materials, and complexity. As a general guide, extensions in areas like Welwyn Garden City, Hertford, and Stevenage can differ based on property type and finish. We provide detailed, transparent quotes tailored to your project after an initial consultation.

At Mars Building Group, project timelines vary depending on the scope of work. Toensure a transparent and smooth experience, we provide every client with a clear and detailed project schedule before work begins. This schedule outlines key milestones and expected completion dates, allowing you to have a clear understanding of what to expect at each stage of the construction process. Our commitment to communication helps keep clients informed and confident throughout their project.

Yes, we design and build loft conversions in St Albans, Stevenage, Hitchin, Welwyn, and Hertford. Loft conversions are a cost-effective way to add space without moving and are ideal for bedrooms, home offices, or en-suites.

We work on a wide range of properties across Hertfordshire, including:Period homes Family homes Modern properties Character properties Passive Houses Each project is tailored to suit the style and structure of your home.

Yes, Mars Building provides a complete design and build service, managing everything from initial consultation and planning through to construction and completion. This ensures a smooth, stress-free experience for our clients.

Absolutely. We assist with planning applications, building regulations, and structural requirements across all local councils in Hertfordshire, ensuring your project meets legal standards.

Yes, we are a family-run business with over 25 years of experience working across St Albans, Welwyn, Hertford, Knebworth, Stevenage, Hitchin, and nearby areas. Our local knowledge ensures efficient project delivery and high-quality results.

Yes, we offer free, no-obligation quotes. We’ll arrange a site visit, discuss your requirements, and provide a clear breakdown of costs.

We cover all major areas in Hertfordshire, including:St AlbansWelwyn & Welwyn Garden CityHertfordKnebworthStevenageHitchinIf you’re searching for a builder near me in Hertfordshire, Mars Building is your trusted local choice.

Over 25 years of experienceFamily-run, trusted local businessHigh-quality workmanshipTransparent pricingTailored solutions for every project We focus on delivering long-lasting results that add value to your home.