Building Extensions

Construction timeframes for extensions in Bath and Bristol vary based on size and complexity. A typical single-storey rear extension (approximately 20-30m²) usually takes 10-14 weeks to build once all permissions are in place. Double-storey extensions generally require 14-20 weeks, while more complex projects involving period properties in Bath may take longer due to specialised construction techniques. The timeline breaks down approximately as: ground works and foundations (2-3 weeks), structural work and roof (3-5 weeks), windows and doors (1-2 weeks), first-fix electrics and plumbing (1-2 weeks), plastering and internal finishing (2-3 weeks), and final decorating and snagging (1-2 weeks). Weather conditions, material availability, and unforeseen structural issues can all impact the timeline. We provide a detailed construction schedule before work begins and keep you updated on progress throughout.

Extension building costs in Bath typically range from £1,500 to £2,500 per square metre, depending on specification level and complexity. For a standard 30m² single-storey rear extension, budget approximately £45,000-£75,000, while a similar size extension with premium finishes in Bath's conservation areas might reach £60,000-£90,000. Double-storey extensions offer better value per square metre, typically costing 50-70% more than a single-storey (not double) due to economies in foundations and roofing. Additional factors affecting costs include site access difficulties (common in Bath's terraced streets), structural complexity, service relocations, and whether the extension includes specialised areas like kitchens or bathrooms. We provide detailed, transparent quotations based on your specific requirements and property, breaking down costs for materials, labour, fixtures and fittings to give you complete clarity on your investment.

Yes, most Bath and Bristol homeowners remain living in their property during extension construction. We implement careful measures to minimise disruption, including: creating dust barriers between living areas and construction zones, maintaining essential services like water and electricity, establishing clear site boundaries, scheduling noisy work during reasonable hours, providing temporary kitchen facilities if necessary, and maintaining a tidy, safe site daily. The most disruptive phase typically occurs when breaking through from the existing house to the new extension, which we carefully plan and execute as efficiently as possible. For particularly complex projects or where access through your home is unavoidable, we can discuss timing options that might align with planned holidays. Our experienced team is accustomed to working around occupants and will communicate regularly about upcoming potentially disruptive phases.

Yes, we provide comprehensive management of building regulations compliance for extensions in Bath and Bristol. Our service includes preparation of detailed construction plans that satisfy building regulations requirements, submission of applications to local authority building control or approved inspectors, coordination of all necessary inspections throughout the build, and obtaining final completion certificates. We schedule inspections at critical stages (foundations, damp proof course, structural work, etc.) and ensure all work meets or exceeds current regulations for structural integrity, fire safety, ventilation, energy efficiency, and accessibility. For extensions to period properties in Bath, we're experienced in balancing conservation requirements with building regulations. This complete service removes the stress of regulatory compliance from homeowners, ensuring your extension is legally compliant and built to the highest safety and quality standards.

Yes, we specialise in sourcing and matching materials for extensions to Bath's distinctive period properties. For Bath stone extensions, we work with local quarries to source genuine Bath stone or appropriate reconstituted alternatives that match the colour, texture and weathering characteristics of your existing stonework. For Georgian and Victorian properties, we can source matching traditional materials including handmade clay tiles, slate, traditional lime mortars, timber sash windows, cast iron rainwater goods, and authentic joinery details. Our skilled craftspeople are experienced in traditional building techniques necessary for authentic finishes. When exact matches aren't available or conservation requirements permit contemporary elements, we can create sympathetic junctions between old and new. We frequently work with Bath's conservation officers and have a strong understanding of acceptable materials and techniques for the city's historic buildings.

For Bristol's many terraced and semi-detached properties, Party Wall considerations are often essential when building extensions. We provide guidance through this process, helping you understand when the Party Wall Act applies (typically when building on or near a boundary, working on a shared wall, or excavating near neighbouring buildings). Our service includes determining which neighbours require Party Wall notices, preparing and serving the appropriate notices (typically 1-2 months before work starts), and assisting with documentation if neighbours consent. If neighbours dissent, we can recommend independent Party Wall Surveyors to prepare the necessary legal agreements. For Bristol terraced properties, particularly in areas like Clifton, Redland, or Southville, our experience with local building techniques helps us anticipate and address common Party Wall concerns, enabling smoother relations with neighbours and avoiding costly delays to your extension project.