How much does it cost to build an extension in East London?

Determining the cost of building an extension in East London can be influenced by a variety of factors, including the type of extension, size, complexity, materials used, and the prevailing market rates. In recent years the costs of materials have risen significantly, so it's advisable to consult with local contractors or construction professionals for the most up-to-date information.

Factors Influencing Cost

• The type of extension significantly affects the cost. Whether it's a single-storey or double-storey extension, a kitchen extension, or a loft conversion, each comes with its own set of challenges and requirements that can impact the overall cost.
• The size and complexity of the extension play a crucial role. Larger extensions with intricate designs or features may require more labour, materials, and time, thereby increasing the overall cost.
• The choice of materials can have a substantial impact on the cost. High-end or custom materials will naturally incur higher expenses compared to standard or more economical options.
• The specific location within East London can influence costs. Different areas may have varying construction costs and market rates for labour and materials.
• The cost of planning and design, including architectural services and obtaining necessary permits, should be considered. Professional services contribute to the overall success and legality of the extension project.
• If the extension involves connecting to existing utilities or modifying the infrastructure, additional costs may be incurred to ensure compliance with regulations and standards.

 
Average Costs for Extensions in East London
As of 2023, the average cost for building an extension in East London could range from £1,200 to £2,500 per square metre. However, these are general estimates, and actual costs may vary based on the factors mentioned above.
 
Single-Storey Extension
For a single-storey extension, the cost can vary from £1,200 to £2,000 per square meter. This type of extension is often more straightforward than multi-storey alternatives.
 
Double-Storey Extension
Double-storey extensions are more complex and may cost between £1,500 and £2,500 per square meter. This higher cost is attributed to the increased structural requirements and additional complexities involved in building vertically.
 
Kitchen Extension
A kitchen extension can have costs ranging from £1,500 to £2,500 per square meter. The inclusion of specialised features, high-end appliances, and custom finishes may impact the final cost.
 
Loft Conversion
Loft conversions are generally priced between £1,200 and £2,000 per square meter. The existing structure of the house and the extent of modifications required influence the cost.
 
Additional Costs to factor in 

• Architectural fees typically range from 5% to 15% of the total construction cost. These fees cover the design, planning, and oversight of the project.
• Costs associated with obtaining planning permission and complying with building regulations should be factored in. Planning permission costs can vary, and it's essential to check with the local authorities.
• Interior finishes, such as flooring, fixtures, and fittings, contribute to the final cost. Higher-end finishes will increase expenses.
• Hiring a project manager can be beneficial but comes with additional costs. Project management fees are typically around 10% to 15% of the total construction cost.
• It's advisable to set aside a contingency fund of around 10% to 15% of the total budget to account for unforeseen circumstances or changes during construction.

 
In conclusion, the cost of building an extension in East London is influenced by numerous factors, and it's crucial to consider each aspect carefully. Obtaining detailed quotes from reputable contractors, consulting with architects, and conducting thorough research on local construction costs are essential steps in accurately estimating the budget for your extension project.