Planning to replace your internal doors but unsure what you should budget? The internal door installation cost depends on more than the price of the door itself. Labour, materials, hardware and the condition of your existing frames all influence the final quotation.
Whether you're replacing one bedroom door or upgrading an entire property, understanding these costs can help you avoid unexpected expenses and make informed decisions.
What Factors Affect Internal Door Fitting Prices?
Door Type And Materials
Hollow-core doors are generally the most affordable, while solid oak, glazed and premium designs cost more.
The weight, construction and finish can also influence fitting time. A heavier door may require different hinges or additional handling.
For unusual openings, bespoke internal doors may be worth considering, although made-to-measure manufacturing usually increases the overall budget.
Labour And Installation Complexity
Internal door installation labour costs depend on the work involved.
Fitting a standard door into a sound, square frame is generally more straightforward than correcting uneven openings or replacing damaged components.
Older properties across Somerset and Devon can have irregular frames, making accurate measurement particularly important.
Frames, Handles And Accessories
A quotation may not include everything needed to complete the job.
Additional expenses can include:
- Hinges, handles, latches and locks
- Frame adjustments or replacements
- Removal and disposal of old doors
- Painting, staining or finishing
- Changes to flooring clearance
Our interior door frame solutions can help where existing frames need attention.
How Much Does Fire Door Installation Cost?
Fire door installation costs require separate consideration because a fire-rated doorset must meet its specified performance requirements.
Costs depend on the fire rating, compatible frame, seals, hinges, closers and specialist fitting.
Unlike standard internal doors, fire doors cannot simply be trimmed or modified without considering the manufacturer's permitted limits and certification.
The government's Approved Document B provides guidance on fire safety requirements in England.
At inDoors, our fire door installation service considers the complete doorset rather than the door leaf alone.
Is It Cheaper To Replace Several Internal Doors Together?
It can be. Fitting multiple doors during one visit may reduce the average labour cost because travel, preparation and equipment setup are shared across the project.
However, savings depend on the doors and openings involved.
Before ordering several doors, we recommend checking each opening individually. Even doorways that appear identical can have different measurements.
How Can You Keep Internal Door Replacement Costs Down?
The cheapest door is not always the most economical choice over time.
To manage your budget:
- Check whether existing frames can be retained.
- Choose standard sizes where suitable.
- Compare labour-only and complete supply-and-fit quotations.
- Consider refurbishment where existing doors remain serviceable.
- Confirm hardware, finishing and disposal costs before agreeing to work.
Our internal door fitting service covers customer-supplied doors as well as coordinated installation projects.
Frequently Asked Questions
Is It Cheaper To Buy My Own Internal Doors?
Sometimes, but not necessarily. Buying separately gives you control over product selection, while a supply-and-fit service helps coordinate sizing, hardware and installation.
How Long Does Internal Door Installation Take?
A straightforward replacement may take a few hours. Frame alterations, bespoke fitting and specialist fire doors can take longer.
Do I Need To Replace My Door Frames?
Not always. Existing frames can often be reused if they are sound, correctly aligned and suitable for the replacement door.
Get A Clearer Idea Of Your Internal Door Installation Cost
Understanding the individual costs makes comparing quotations easier and helps you plan a realistic budget.
With over 24 years of carpentry and joinery experience, we can help you assess your options, whether you're replacing one door or planning a larger property upgrade.
If you're budgeting for internal doors in Somerset, Devon or surrounding areas, contact inDoors to discuss your project and request a tailored quotation.

