A bedroom extension is a home improvement project that provides a larger living space, adds functionality, and significantly improves the value of your property. Understandably, expanding your living space by adding an extra bedroom is a challenging undertaking that requires careful planning and cost management.
In the UK, bedroom extension costs typically range from £20,000 to £80,000, depending on factors such as property location, extension size, design complexity, and materials. You can hire builders to manage a house extension project and obtain a specific quotation that includes all the costs.
Bedroom Extension Cost by the Type of Extension
Different types of bedroom extensions come with different price points, based on size, layout, structural complexity, and interior requirements.
Extra Bedroom Extension Cost
An extra bedroom extension usually costs between £20,000 and £80,000. The price depends heavily on the building’s size, material quality, location, and complexity.
Size: A larger space requires more materials and labour, resulting in higher costs.
Material and complexity: Premium finishes, intricate layouts, or customised significantly increase overall build costs.
Master Bedroom Extension Master Bedroom Extension cost
A master bedroom extension typically costs between £35,000 and £80,000, including an en-suite bathroom and other premium features.
Custom features: Stylish window design, wardrobes, and custom finish add additional cost in extension.
Utilities: Additional electrical and heating work increases labour and material costs.
Bedroom and En-Suite Extension Cost
A bedroom with an en-suite extension can cost between £40,000 and £90,000, depending on size, finish quality, and other features.
Plumbing: New drainage and water supply connections can increase the cost.
Fixture and fitting quality: Premium sanitary ware and tiling led to additional budget.
Health and safety: Compliance with ventilation, waterproofing, and building regulations adds further expense.
Bedroom Extension Cost by Different Components
The total cost of a bedroom extension comprises several key components. On average, the price per square metre for a bedroom extension ranges between £1,200 and £2,000.
1. Material costs
Material cost for a bedroom extension can be different depending on its quality. It can account for 30% to 40% of the total budget, covering structure and finishes.
- Bricks and Blocks: £800 – £1,200 per 1,000 units
- Cement and Sand: £2 – £6 per bag
- Timber: £15 – £25 per meter
- Insulation: £20 – £50 per roll
- Windows: £200 – £600 per unit
- Doors: £250 – £1,000 depending on type
2. Labour Cost
Labour costs typically account for 30% to 60% of the total project budget, depending on location, project complexity, and the specific trades required.
- General Building Work: £1,200 to £1,800 for a week
- Electrical Work: £35 to £55 for an hour
- Plumbing Work: £35 to £55 for an hour
- Plastering: £150 to £200 per day
- Carpentry: £150 to £200 per day
- Architectural Services: 5% to 15% of total build cost
3. Planning And Permits Cost
The planning and regulatory costs for a bedroom extension typically range from £500 to £4,000, depending on your location, project size, and whether you need to hire professionals.
- Planning Permission Application can cost £200 – £500
- Building Regulations Approval can cost £200 – £500
- Structural Engineer Fees range from £500 – £1,500
- Waste Removal costs £150 – £450
- Contingency Fund is 10% – 20% of the total project cost
Additional Costs to Consider for Bedroom Extension
Beyond construction, extra charges often arise from decorating and furnishing choices.
Quality of finish: The primary quality that increases cost is the quality of finish. Choosing high-quality flooring, bespoke joinery, premium lighting, and fixtures is more expensive than standard options.
Paint and wallpaper: Feature walls and specialist finishes require high-quality paint or skilled application.
Professional fee: Hiring interior designers or project managers to achieve a specific aesthetic will increase the budget. They typically range from a set hourly rate to a percentage of the total project cost.
Conclusion
Undoubtedly, a 1-bedroom extension is a valuable investment that adds functionality and increases your home’s value. However, you should consider a proper budget when planning, as materials, permits, and finish quality all play a major role in the overall budget. Hiring skilled professionals and a reasonable contingency fund helps keep your extension on schedule and provides lasting value to your space.