What Is the Most Expensive Part of Building a House?

There isn't one single answer. The biggest costs usually come from the structure, finishes, roof, windows and doors, kitchen and bathrooms.

The structure

The structure of the house can account for a large part of the construction cost. This includes:

• Foundations

• Concrete

• Reinforcement

• Brickwork or blockwork

• Floor slabs

• Structural beams

• Roof structure

A complicated design with lots of corners, levels or large openings can cost more to construct than a simple design of the same size.

Finishes can add up quickly

Once the house is built, finishes can make a big difference to the final cost.

These include:

• Flooring

• Tiling

• Painting

• Ceilings

• Doors

• Kitchen cupboards

• Built-in cupboards

• Bathroom fittings

• Countertops

Choosing higher-end finishes can increase the cost considerably.

Kitchens and bathrooms

Kitchens and bathrooms can be some of the most expensive rooms in a house because they contain many different materials and fittings.

A kitchen may include cupboards, countertops, appliances, sinks, taps, plumbing and electrical work.

Bathrooms require sanitaryware, showers, baths, basins, tiling, waterproofing and plumbing.

Windows and doors

Large windows, sliding doors and extensive glass can also increase the construction cost.

The price depends on the size, quantity, frame material, glass and hardware.

Don't forget the roof

Your roof includes more than just the tiles or metal sheeting. You also need to allow for the roof structure, insulation, waterproofing, gutters and other components.

A complicated roof design can cost more than a simple roof.

Your site can affect the cost

The building site itself can add significant costs.

For example, a steep or difficult site may require:

• More excavation

• Special foundations

• Retaining walls

• Additional drainage

• More difficult access

So where should you spend your budget?

The answer depends on your house and your priorities. A simple design and carefully selected finishes can help control costs without necessarily reducing the quality of the building.

It's also important to budget for external work such as paving, boundary walls, gates and landscaping.

Know your costs before you build

The best way to understand where your money will go is to have your plans properly costed.

A building cost estimate can help you identify the major costs of your project and make changes to the design or finishes before construction starts.