Need some extra space, but think you can’t afford it?
Building an outbuilding is one of the cheapest ways to add to your usable space compared to a house extension. However, there is a big problem with that…
If you don’t make the right design choices, the costs can rack up quicker than you think.
Thankfully, that’s where this article comes in!
With some ingenious design solutions, we are going to show you how you can keep the cost of your outbuilding construction low and still get the space you need.
What you’ll discover:
- The Cost of Outbuilding Construction Today
- Material Options: Where You Can Save the Most Money
- Foundation Solutions: Saving on the Bottom Line
- Space Maximising Design Strategies
The Cost of Outbuilding Construction Today
It’s not cheap. In fact, construction costs account for 64.4% of an average building’s price. The highest it’s been since records began in 1998.
For outbuildings specifically, prices are anywhere from £6,500 for a simple timber building up to £22,000+ for a brick built garage. That’s a large amount of variance, and design is a key factor.
So let’s see why that is:
The first is the impact of cost inflation which peaked in 2022 at a ridiculous 17.3% before easing to 6.5% last year, and is projected at 3.4% in 2024. That’s still high by historical standards.
Material costs are a particular sticking point. Many prices are higher than pre-pandemic levels and show no sign of coming down. Timber, steel, and masonry products all continue to be significantly more expensive.
Also, basic labour costs have remained high. Fewer people are in the building trade so those who are have more power to push wages up.
However, there’s some good news.
Design solutions can combat those inflation costs and still give you the outbuilding you desire.
Material Options: Where You Can Save the Most Money
In controlling your cost of building an outbuilding, your material selection is key.
Here are a few different types of building materials along with some pros and cons to consider:
Timber
Timber is the most cost-effective option for a reason.
A simple timber outbuilding can be as low as £6,500 and that’s because:
- It’s quick to build. Less labour means lower construction costs.
- Easier to work with needing fewer specialist trades.
- Provides great insulation properties when done correctly.
- Timber structures can be easily upgraded over time.
Steel Frame
Steel frame building is increasing in popularity as it provides several cost-effective advantages:
- It assembles in a day or less.
- Minimal or no foundation requirement.
- Longevity is great with little maintenance needed.
- Better pest and weather resistance.
Hybrid Approach
Smart builders are mixing and matching materials where they work best.
Steel frame and timber cladding. Concrete block first floor with timber structure above. Steel lintels instead of timber.
Mixing and matching can:
- Allow cheaper materials to be used where they are appropriate.
- Upgrade certain areas for longevity.
- Balance the initial cost versus long term value.
Foundation Solutions: Saving on the Bottom Line
Slab foundations are expensive. An outbuilding slab needs to be reinforced and bigger than one for a house due to smaller area to spread the loads. That’s a lot of concrete!
However, builders are finding innovative solutions to reduce costs.
Screw Pile Foundations
A clever innovation that can save you a bundle on site preparation costs are screw pile foundations.
They have several advantages for outbuilding projects:
- No excavation. Saves on site prep costs.
- Can be installed in all weathers.
- Instantly load-bearing. Get started on the build quicker.
- Ideal for uneven ground.
Floating Slab Foundations
A smaller outbuilding will be cheaper with a floating slab foundation than a full concrete slab.
They are also quicker to install with:
- Reduced concrete use.
- Faster build time.
- Better drainage characteristics.
- Lower skilled labour.
Pad Foundation Network
Concrete pads under key structural elements is a middle way between a full slab and screw piles.
This type of foundation can:
- Use 60% less concrete than a full slab.
- Provide excellent stability.
- Better drainage.
- Reduce excavation and site work.
Space Maximising Design Strategies
Don’t want to increase your building’s footprint? Innovative design will give you value for money.
Vertical Space Utilisation
People think in two dimensions. Space builders think vertically.
Vertical space strategies include:
- Loft spaces will add up to 40% more usable floor area.
- Ceiling height makes rooms feel bigger.
- Mezzanine floors are perfect for storage.
- Tall doors allow larger equipment.
Multi-Purpose Design Elements
Every design element should do at least two jobs:
- Structural beams doubling as storage.
- Built-in workbenches reinforce walls.
- Window seats that have storage.
- Roof overhangs create a covered outdoor area.
Modular Construction Techniques
Modular approaches can cut down your construction costs in a big way.
Advantages of modular construction:
- Wall panels pre-fabricated in a factory for quick assembly.
- Standard dimensions reduce waste.
- Factory construction means no weather delays.
- Quality control happens under controlled conditions.
Smart Technology Integration
Technology isn’t just for luxury homes. Some smart outbuilding design can incorporate cost-effective tech solutions.
Energy Efficiency
LED lighting systems reduce electrical installation costs.
Smart insulation placement can reduce the need for heating.
Passive solar design removes the need for mechanical systems.
Natural ventilation.
Construction Technology
New building tech and techniques also make construction faster and cheaper.
- CAD design software can reduce material waste by up to 15%.
- Digital measuring tools reduce errors.
- Modular assembly systems improve speed of construction.
- Prefabricated materials off-site eliminate on-site waste.
Cost Control in Planning
The single biggest cost savings will be made before your first brick is laid.
Permit and Planning Optimization
Most outbuildings qualify as “Permitted Development”.
This means:
- No need for planning permission.
- Quicker project times.
- Lower regulatory costs.
- Simplified approval process.
Site Preparation Efficiency
Smart site planning can cut your preparation costs too:
- Choose a site with good natural drainage.
- Minimise tree removal and landscaping.
- Plan for access routes for construction equipment.
- Factor in utility connections early.
Construction Sequencing
The order of construction will also affect the cost.
- Schedule concreting work when the weather is good.
- Coordinate multiple trades to reduce site visits.
- Plan material deliveries to minimise on-site storage.
- Phased construction will spread the costs.
Future-proofing your Investment
Smart outbuilding design also factors in future needs and contingencies.
Adaptable Spaces
Designing for flexibility can save money in the long run:
- Use removable interior walls to change layouts.
- Electrical and plumbing systems designed to be expanded.
- Foundation systems that can support future extensions.
Maintenance Minimisation
Lower future costs through smart material choices:
- Use weather resistant materials that don’t need to be replaced often.
- Accessible design makes maintenance easier.
- Quality components cost more upfront but last longer.
- Simple systems that are easy and cheap to repair.
Making Your Outbuilding Project Happen
Building a cost-efficient outbuilding isn’t about skimping on quality.
It’s making smart decisions about upfront and long term value.
Here are some actionable steps to move forward:
- Define what you actually need versus what’s nice to have.
- Get quotes for different material approaches.
- Factor in phased construction to spread costs.
- Design with future needs in mind.
The construction industry is in a state of flux. Costs are stabilising after recent peaks but still show increases. With construction costs up 3.9% year on year, the time to act is now.
Wrapping it all Together
Building a cost-efficient outbuilding is all about making the right choices. From clever foundation systems to space-maximising design strategies and more, the options to keep costs down are wide-ranging.
Understanding the difference between cheap and cost-effective is the key. It’s not about cutting corners but smart design choices to balance initial outlay and long term value. That gives you the extra space you need at a price you can afford.
Construction costs are at record highs. A better understanding of what drives those costs is now a financial decision. If you are planning to build an outbuilding, the time to act is now. Get quotes from different builders, plan your build carefully, and start saving now.