Why Choose a Double Storey Extension?

Maximize Living Space

A double storey extension effectively doubles your available space, allowing you to:

Add Extra Bedrooms: Ideal for growing families.
Create a Home Office: Accommodate remote work with a dedicated space.
Expand Living Areas: Enlarge your kitchen, dining, or living rooms.
Include Additional Bathrooms: Increase convenience and comfort.

According to the Royal Institution of Chartered Surveyors (RICS), extending your home is a cost-effective way to gain more space without the expenses of moving.

Increase Property Value

Boost Market Appeal: A larger home attracts a broader range of buyers.
High Return on Investment: Extensions can add up to 23% to your property's value (Source: Homebuilding & Renovating).

Cost-Effective Expansion

Shared Costs: Utilize existing foundations and roofing for both floors.
Economies of Scale: Lower cost per square meter compared to single-storey extensions.

Customized Design

Tailored Spaces: Design each floor to meet your specific needs.
Modern Amenities: Incorporate smart home technology and energy-efficient systems.
Aesthetic Appeal: Enhance your home's exterior and interior design.

Planning Permission and Regulations

Understanding Planning Permission

Mandatory Approval: Double storey extensions typically require planning permission due to their size and impact.
Local Council Guidelines: Regulations vary by area; consult your local planning authority.

Permitted Development Rights

In some cases, your extension may fall under permitted development if it meets certain criteria:

Size Limitations: Extends no more than 3 meters from the original house (semi-detached) or 4 meters (detached).
Height Restrictions: Does not exceed the highest part of the existing roof.
Boundary Proximity: Not within 7 meters of the rear boundary.

Always verify with professionals to ensure compliance.

Building Regulations Compliance

Structural Integrity: Ensure the extension is safely constructed.
Fire Safety: Install proper fire doors, alarms, and escape routes.
Energy Efficiency: Meet standards for insulation, ventilation, and heating.
Accessibility: Adhere to regulations for accessible design features.

Party Wall Agreements

Legal Requirement: Necessary if the extension affects shared walls or boundaries.
Neighbor Relations: Formal agreement to prevent disputes.

Our team handles all aspects of planning and compliance to streamline your project.

Design Considerations

Architectural Harmony

Matching Materials: Use bricks, roofing tiles, and windows that complement the existing structure.
Consistent Styling: Maintain architectural features for a seamless look.
Roof Design: Align roof pitches and heights for uniformity.

Interior Layout Optimization

Functional Flow: Design rooms for convenient movement and accessibility.
Lighting Solutions: Incorporate natural and artificial lighting effectively.
Space Utilization: Maximize storage with built-in solutions.

Sustainability Features

Eco-Friendly Materials: Use recycled or sustainably sourced materials.
Renewable Energy Systems: Install solar panels or ground-source heat pumps.
Water Conservation: Implement rainwater harvesting and low-flow fixtures.

Integration with Outdoor Spaces

Garden Access: Add bi-fold doors or patios to connect indoor and outdoor areas.
Landscaping: Plan garden redesigns to complement the extension.

The Construction Process

Step 1: Consultation and Planning

Initial Meeting: Discuss your vision, requirements, and budget.
Feasibility Study: Assess site conditions and potential challenges.
Design Proposal: Present preliminary sketches and concepts.

Step 2: Detailed Design and Approval

Architectural Drawings: Develop detailed floor plans and elevations.
Structural Engineering: Calculate loads and specify materials.
Planning Submission: Prepare and submit applications to authorities.
Regulatory Approvals: Obtain necessary permits and consents.

Step 3: Pre-Construction Preparation

Project Scheduling: Create a timeline with milestones.
Contract Agreements: Finalize terms with builders and suppliers.
Site Preparation: Secure the area and arrange for utilities.

Step 4: Construction Phase

Foundation Work: Excavate and lay foundations according to specifications.
Framing and Structure: Build walls, floors, and roof structures.
Utility Installations: Install electrical, plumbing, and HVAC systems.
Inspections: Conduct regular checks for compliance and quality.

Step 5: Interior and Exterior Finishing

Insulation and Drywall: Ensure energy efficiency and prepare walls.
Flooring and Tiling: Install chosen materials for floors and walls.
Painting and Decorating: Apply finishes to walls, ceilings, and trim.
Exterior Cladding: Complete brickwork or rendering.

Step 6: Finalization and Handover

Snagging List: Identify and rectify any minor issues.
Final Inspection: Certify compliance with building regulations.
Documentation: Provide warranties, manuals, and certificates.
Client Walkthrough: Ensure satisfaction with the completed work.

We provide project management throughout to keep you informed and involved.

Costs and Budgeting

Understanding the Costs

Design Fees: Architectural and engineering services.
Planning Fees: Application costs for permissions.
Construction Costs: Materials, labor, and project management.
Finishing Costs: Fixtures, fittings, and landscaping.

Average Cost Breakdown

Ground Floor Extension: Approximately £1,500 per square meter.
Second Floor Addition: Slightly less due to shared foundations.
Total Estimated Cost: Ranges from £60,000 to £200,000, depending on size and specifications.

Budget Management

Contingency Fund: Allocate 10-15% extra for unforeseen expenses.
Itemized Quotes: Ensure transparency with detailed cost breakdowns.
Regular Updates: Keep track of expenditures against the budget.

Financing Your Extension

Savings: Utilize personal funds for interest-free investment.
Home Equity Loans: Borrow against the value of your property.
Financing Plans: Some contractors offer payment plans.

We assist in creating a financial plan that suits your situation.

Case Studies

Case Study 1: The Family Home Upgrade

Location: Wimbledon

Challenge: A growing family needed more space but didn't want to leave their beloved neighborhood.

Solution:

Added two bedrooms and a bathroom upstairs.
Expanded the kitchen and dining area downstairs.
Used matching bricks and roof tiles for seamless integration.

Result:

Increased living space by 60 square meters.
Enhanced property value by 25%.
Family remained in their community with a home that meets their needs.

Case Study 2: Modernizing a Victorian Terrace

Location: Central London

Challenge: Update a historic home with modern amenities while preserving its character.

Solution:

Designed a double storey rear extension.
Incorporated large glass panels for natural light.
Used period-appropriate materials on the exterior.

Result:

Successfully blended old and new aesthetics.
Achieved an open-plan living area with a master suite above.
Received positive feedback from local conservation officers.

Case Study 3: Sustainable Living Expansion

Location: Epsom

Challenge: Create an eco-friendly extension adhering to strict environmental standards.

Solution:

Installed solar panels and a green roof.
Used timber frames and recycled materials.
Implemented underfloor heating and triple-glazed windows.

Result:

Reduced energy consumption by 50%.
Provided a healthier living environment for the family.

Read more about our successful projects here.

Frequently Asked Questions

Q: How long does a double storey extension take to complete?

A: The entire process typically takes 6 to 9 months, including design, planning approvals, and construction. The timeline can vary based on the project's complexity and the local authority's processing times.

Q: Will the extension cause significant disruption to my daily life?

A: We strive to minimize disruption by:

Efficient Scheduling: Planning work to reduce impact on your routine.
Clean Worksites: Maintaining tidy areas and managing waste.
Clear Communication: Keeping you informed about upcoming activities.

Q: Can the extension be designed to future-proof my home?

A: Absolutely. We can incorporate features like:

Flexible Spaces: Rooms that can adapt to changing needs.
Smart Home Technology: Automated lighting, heating, and security.
Accessibility: Design elements that accommodate mobility changes.

Q: How do I ensure the extension won't negatively affect my neighbors?

A: We conduct:

Impact Assessments: Evaluate sightlines, overshadowing, and privacy.
Consultations: Engage with neighbors during the planning stage.
Compliance: Adhere to regulations regarding boundaries and party walls.

Q: What if my property is in a conservation area or is a listed building?

A: Special considerations are required, but extensions are still possible:

Heritage Approval: Obtain necessary consents from heritage bodies.
Sensitive Design: Use materials and styles that preserve historical value.
Expert Guidance: Our team has experience navigating these complexities

Get Started Today

Ready to enhance your home with a double storey extension?

Free, No-Obligation Consultation: Discuss your ideas with our experts.
Personalized Service: From concept to completion, we're with you every step.
Quality Assurance: Committed to excellence in every project