Best Windows for Loft Conversions: A Complete Guide

Choosing the right windows for your loft conversion is essential to maximise light, ventilation, and energy efficiency. This guide will help you navigate the various options and considerations to ensure your loft is functional and beautiful.

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The importance of windows in loft conversions

To make the most of your loft conversion, it's essential to understand the different types of windows available and how each can enhance your space.

Whether you're considering dormer windows for added headroom or skylights for maximum natural light, choosing the right type can significantly improve the functionality and aesthetics of your loft. 

Here are the main types of loft conversion windows:

Natural light

Windows fill your loft with natural light, transforming a dark attic into a bright, inviting space. This light makes the loft feel bigger and more open. A well-lit loft is more pleasant and can boost your mood and productivity.

Ventilation and air quality

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Energy efficiency

Modern windows improve energy efficiency. Features like double glazing and low-emissivity coatings help keep heat in during winter and out during summer, reducing energy bills and lowering carbon footprint. Velux windows, for instance, offer ThermoTechnology™ for superior insulation.

Aesthetic appeal and value addition

Well-placed windows enhance the look of your loft. They offer stunning views and add architectural interest. Whether it's a skylight, dormer window, or gable-end window, each type adds a unique character. Attractive and functional windows can also boost your property's value.

Safety and compliance

Windows in lofts must meet safety regulations, especially for fire escape routes. Easy-to-open windows that provide a clear exit are crucial in emergencies. Meeting these regulations ensures safety and avoids legal issues during inspections and sales.

Enhanced usability of space

Windows can transform an unused attic into a functional living area like a bedroom, office, or playroom. Natural light and ventilation make these spaces comfortable and practical.

Top-hung roof windows provide more headroom and a great view, making the loft feel more connected to the outdoors.

The different types of loft conversion windows

Whether you're considering dormer windows for added headroom or skylights for maximum natural light, choosing the right type can significantly improve the functionality and aesthetics of your loft.

To make the most of your loft conversion, it's essential to understand the different types of windows available and how each can enhance your space.

Dormer windows

Dormer windows extend vertically from the sloping roof, creating extra headroom and floor space inside the loft. They let in plenty of natural light and come in various styles, such as flat-roofed, gable-fronted, hipped, and shed dormers. Dormer windows make the loft space more usable and comfortable.

Explore Dormer loft conversions.

Roof windows (skylights)

Roof windows, or skylights, are installed flush with the roofline, making them less obtrusive. These windows are perfect for maximising natural light without altering the roof's structure.

Velux windows are popular, offering options like top-hung, centre-pivot, and electric or solar-powered versions for added convenience.

Explore Velux loft conversions.

Casement windows

Casement windows are similar to standard windows found in other parts of the home. Hinged on the side, they open outwards and are easy to operate. While they may require specific planning due to building regulations, casement windows provide excellent ventilation and light.

Gable end windows

Gable end windows are placed in the vertical end wall of a loft, taking advantage of the triangular shape formed by the roof's slope. These windows offer stunning views and can significantly enhance the loft's aesthetic appeal.

Explore Hip to Gable loft conversions.

Balcony windows

Balcony windows, also known as Cabrio windows, transform into a small balcony when opened. This innovative design allows you to enjoy outdoor space from your loft. Although they are more complex to install and require specialist help, balcony windows add a unique feature to your home.

Fixed and picture windows

Fixed windows do not open but are great for providing unobstructed views and allowing maximum light. They can be combined with other window types for optimal light and ventilation. Picture windows are similar but often larger, serving as a focal point.

Top-hung roof windows

Top-hung roof windows open outwards from the top, providing an unobstructed view and more headroom. These windows are ideal for higher roof pitches and offer excellent ventilation and light.

Centre-pivot roof windows

Centre-pivot windows have a pivot in the centre, allowing them to rotate and providing easy cleaning and ventilation access. They are easy to operate and can be installed lower than top-hung windows, offering a great view even when seated.

Sliding windows and doors

Sliding windows and doors can be used in loft conversions to create large, floor-to-ceiling openings. They are particularly effective for gable ends and can include features like Juliet balconies to enhance safety while providing expansive views.

Cost of loft windows for your conversion

Understanding window costs is crucial when planning your loft conversion. The right windows enhance your loft's look, function, and budget.

Below is a table with cost ranges - Use this information to make informed decisions based on your needs.

Window Type Cost Range (GBP) Notes
Dormer Windows £1,000 - £3,000 Require significant structural changes, increasing the cost.
Roof Windows (Skylights) £250 - £1,200 Generally less expensive and easier to install. Popular choice with varying prices based on additional features.
Casement Windows £300 - £800 Similar to standard house windows but may require additional planning for loft conversions.
Gable End Windows £800 - £2,500 Can be similar in cost to dormer windows, especially if significant structural work is needed.
Balcony Windows £2,500 - £5,000 More complex and expensive due to unique design and installation requirements.
Fixed and Picture Windows £200 - £700 Generally less expensive but offer no ventilation.
Top-Hung Roof Windows £400 - £1,200 Offer unobstructed views and more headroom.
Centre-Pivot Roof Windows £300 - £900 Typically less expensive than top-hung windows and easier to operate.
Sliding Windows and Doors £1,500 - £4,000 Often used for larger openings and can be quite expensive.

*Prices are estimates and may vary based on specific conditions and suppliers. Always obtain multiple quotes for the most accurate pricing.

What affects the cost?

Understanding the factors that affect the cost of loft conversion windows can help you plan your budget more effectively. Here are the key factors influencing the amount you pay for your loft conversion windows:

  • Window type and design: Different types and custom designs vary in complexity and cost.
  • Size and dimensions: Larger and custom-sized windows generally cost more.
  • Materials: Frame materials like wood and aluminium are pricier than uPVC.
  • Glazing options: Double or triple glazing and special features like Low-E coatings increase costs.
  • Installation complexity: Structural modifications and complex installations raise labour costs.
  • Energy efficiency features: Energy efficient options cost more upfront but save on energy bills.
  • Additional Features: Extras like electric operation, rain sensors, and integrated blinds add to costs.
  • Labour costs: Vary by region and expertise needed for the installation.
  • Regulatory compliance: Ensuring safety and building regulation compliance may increase costs.
  • Supplier and contractor pricing: Prices vary; obtaining multiple quotes is advisable.

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Additional features and options for your loft conversion windows

When transforming your loft into a functional and beautiful living space, the right windows can make all the difference.

Beyond basic window types, various features and options can enhance your loft's comfort, efficiency, and aesthetic appeal. 

Here are some key additional features and options to consider for your loft conversion windows:

  • Glazing options: Double or triple glazing improves insulation, reduces noise, and boosts energy efficiency. Low-E coatings reflect heat into the room in winter and block heat in summer.
  • Glass types: Tempered glass is more robust and safer, shattering into blunt pieces. Laminated glass adds security and sound insulation. Self-cleaning glass has a unique film that breaks down dirt, which rain then washes away.
  • Frames and finishes: Choose from uPVC (low maintenance), wood (aesthetic appeal), aluminium (durability), and composite (combined benefits). Various colours and finishes match your interior décor and exterior look.
  • Operation and accessibility: Electric and solar-powered windows can be operated with a button or remote control. Rain sensors automatically close the windows when rain is detected.
  • Ventilation and security: Trickle vents allow continuous airflow even when windows are closed. High-quality locks and security bars prevent unauthorised access.
  • Additional design features: Tinted or frosted glass offers privacy while letting light in. Decorative options like lead, stained, or patterned glass add character and style.

Our key loft conversion guides; Just for you.

A selection of our essential guides to help you make the right choice when improving your home with a loft conversion:

1: Loft conversion types
2: Loft conversion costs
3: Loft conversion finance
4: Loft conversion costs calculator