Business Details
Bespoke Glazed Extensions and Conservatories in East Sussex
Hallmark Conservatories has established itself as a leader in creating bespoke living spaces that harmoniously connect homes with outdoor environments. With over 50 years of combined experience, our team specialises in designing and constructing premium glazed extensions, orangeries, conservatories, and garden rooms tailored to individual client needs. Our approach prioritises innovative design, meticulous craftsmanship, and the use of high-quality materials such as oak, hardwood, and uPVC to ensure durability and aesthetic appeal. We provide a comprehensive service from initial consultation through planning applications and building regulations to final installation, supported by a 10-year warranty on all projects.Our commitment to client satisfaction is demonstrated through our collaborative process, which includes 3D design visualisations, detailed cost projections, and expert guidance on material and style choices. Operating across Sussex, Hampshire, Surrey, and Kent, we serve both modern and listed properties, offering solutions that enhance home wellbeing while maintaining architectural integrity. Our team of certified professionals works closely with clients to transform their vision into reality, ensuring every project aligns with both personal preferences and practical requirements.
Services
Conservatories
Orangeries
Oak Extensions
Garden Rooms
Windows and Doors
Verandas
Pergolas
Kitchen Extensions
Highlights and features
- We offer over 50 years of combined experience in bespoke glazed extensions
- Our full-service approach covers design, planning, and certified installation
- We provide 3D design visualisations for accurate project visualisation
- Our team includes Assure Competent Person Scheme certified installers
- We use premium materials including oak, uPVC, and solar-control glazing
Associations and certifications
- The Listed Property Owners' Club
- Competent Person Scheme
What people say
Exemplary workmanship
Seamless installations
Stunning transformations
Professional guidance
Year-round usability
Services
Conservatories
Our bespoke conservatories create light-filled living spaces that seamlessly connect homes with gardens. Using premium uPVC, aluminium, or hardwood frames with solar-control glazing, these structures maintain comfortable temperatures year-round. Clients benefit from custom designs that complement property architecture while adding functional space for dining, relaxation, or entertaining.
Orangeries
Luxury orangeries combine traditional elegance with modern functionality through brick bases and glazed superstructures. These versatile spaces work particularly well for kitchen extensions or dining areas, featuring advanced glazing systems that maximise natural light while maintaining thermal efficiency throughout the seasons.
Oak Extensions
Handcrafted oak-framed extensions bring timeless beauty and structural integrity to residential properties. Our expert joinery techniques showcase the natural grain while ensuring durability, with options for both contemporary and traditional designs that enhance period properties and modern homes alike.
Garden Rooms
Thermally-efficient garden rooms provide flexible spaces for work, exercise, or relaxation with quick installation and minimal maintenance. These insulated structures feature high-specification glazing and can be customised with electrical installations, underfloor heating, and bespoke finishes to match main house aesthetics.
Windows and Doors
We supply and install premium windows and doors in uPVC, aluminium, and hardwood options that enhance security and energy efficiency. Our range includes contemporary flush sashes, traditional casement designs, and bi-fold systems that maximise garden views while maintaining thermal performance standards.
People
Marcus FitzGerald
Managing Director
Marcus leads Hallmark Conservatories with over 25 years' experience in architectural design and home improvement. His vision focuses on creating spaces that enhance wellbeing through natural light integration and sustainable materials. He oversees all projects to ensure design excellence and client satisfaction.
Questions
Do I need planning permission for a glazed extension?
Most projects don't require planning permission as permitted development, though listed properties and locations in AONBs may need approval. Our specialists handle all necessary applications.
Will my new extension be usable year-round?
Yes, our installations use solar-control double glazing that provides 86% heat deflection in summer and maximum retention in winter, with optional roof vents for temperature management.
What is the typical investment range?
Completed projects typically range from £25,000 to £80,000 depending on size, materials, and complexity, including all design, planning, and installation costs.
Which areas do you serve?
Based in Hailsham, East Sussex, we operate across Sussex, Surrey, Kent, and the Home Counties, with specialist experience in both modern and heritage properties.
What warranty do you provide?
All our glazed extension projects come with a comprehensive 10-year warranty covering both materials and workmanship, giving clients complete peace of mind.
How do building regulations apply?
We ensure full compliance with current building control standards, including thermal performance and structural safety requirements, handling all certification processes for clients.
