Flooring Cost Calculator
Planned calculator for estimating total flooring project cost based on flooring type, floor area, number of rooms, old flooring removal, subfloor preparation, room complexity, finish level and region.
Interior cost calculators
Interior Cost Calculators UK
Plan UK interior renovation and finishing costs with CostIntel’s Interior Cost hub. This section is being built to help homeowners estimate flooring, carpet installation, plastering, painting, kitchen renovation and bathroom renovation costs using clear project scopes and realistic planning ranges.
CostIntel provides UK home improvement cost estimates for early planning and quote preparation. These pages are not fixed quotes, contractor services, DIY installation guides, design advice or regulated professional guidance. Final prices depend on labour, materials, access, preparation, finish level, room condition and inspection.
Planned interior cost calculators
The Interior Cost cluster is being built in stages. The calculators below are planned for this section and will be linked once each page is published. For now, this hub explains how the interior cost topics connect and which existing CostIntel calculators may help with early planning.
Flooring Cost per m² Calculator
Planned calculator for comparing flooring unit rates by material type, preparation level and finish quality. This will support users who want a per-square-metre comparison before estimating the whole project.
Carpet Installation Cost Calculator
Planned calculator for carpet supply and fitting, including carpet type, underlay, grippers, stairs, old carpet removal and fitting complexity.
Painting Cost Calculator
Planned calculator for estimating interior painting cost based on room count, wall condition, ceilings, trim, number of coats, finish level and regional labour variation.
Plastering Cost Calculator
Planned calculator for estimating plastering and skim coating costs based on wall area, ceiling area, surface condition, repair level, room complexity and preparation requirements.
Kitchen Renovation Cost Calculator
Planned calculator for estimating whole kitchen renovation cost, including cabinetry level, worktops, flooring, painting, plastering, appliance changes and possible plumbing overlap.
Bathroom Renovation Cost Calculator
Planned calculator for estimating bathroom renovation cost based on fixture level, flooring, plastering, painting, layout change, plumbing overlap and finish level.
Interior Cost Hub
This page will become the main navigation point for the full Interior Cost calculator cluster as each calculator is built and published.
How interior renovation costs connect
Interior renovation costs often overlap. A kitchen renovation may include flooring, painting, plastering and plumbing changes. A bathroom renovation may involve flooring, surface preparation, painting, fixture replacement and waste pipe adjustments. Smaller calculators such as flooring, plastering and painting help clarify the supporting scopes that often sit inside larger room renovation projects.
| Interior project | Related cost areas | Planning note |
|---|---|---|
| Kitchen renovation | Flooring, painting, plastering, plumbing, finishes | A kitchen estimate may need separate checks for plumbing and interior finishes. |
| Bathroom renovation | Plumbing, flooring, plastering, painting, fixtures | Bathroom costs can change when fixtures or waste routes move. |
| Flooring replacement | Floor area, old flooring removal, subfloor preparation | The total project cost can differ from the simple cost per m². |
| Carpet installation | Carpet type, underlay, grippers, stairs, removal | Carpet has unique fitting costs, so it deserves a separate calculator. |
| Painting | Wall condition, ceilings, trim, coats | Poor surfaces may need plastering before decorating. |
| Plastering | Skim coating, ceiling work, repairs, surface preparation | Plastering often affects the final painting cost. |
Existing calculators that may help with interior planning
Some interior renovation projects overlap with plumbing and drainage. These existing CostIntel calculators may help while the Interior Cost calculator pages are being built.
Bathroom Plumbing Cost Calculator
Use this when a bathroom renovation may involve moving a toilet, bath, shower, basin, waste pipe or soil pipe route.
Calculate bathroom plumbing costKitchen Plumbing Cost Calculator
Use this when a kitchen renovation may involve sink relocation, appliance connections or new waste pipe routes.
Calculate kitchen plumbing costPlumbing & Drainage Cost Hub
Compare drainage installation, septic tank, bathroom plumbing and kitchen plumbing estimates in the completed Plumbing & Drainage Cost cluster.
View all plumbing and drainage calculatorsHow Costs Are Calculated
Understand how CostIntel uses project scope, labour, materials, preparation, access and regional variation to produce planning estimates.
Read how costs are calculatedTypical UK interior project cost ranges
These broad planning ranges help compare common interior projects before the individual calculators are published. The final price depends on the agreed scope, preparation, material choices, labour rates, access and inspection.
| Interior project | Broad planning range | Main cost drivers |
|---|---|---|
| Flooring installation | £600–£6,500+ | Floor area, material, old flooring removal, subfloor preparation |
| Flooring cost per m² | £20–£150+ per m² | Flooring type, fitting method, preparation, finish level |
| Carpet installation | £350–£4,500+ | Carpet quality, underlay, stairs, room count, removal |
| Interior painting | £300–£6,000+ | Room count, wall condition, ceilings, trim, coats |
| Plastering | £250–£5,000+ | Wall area, ceiling work, repair level, surface condition |
| Kitchen renovation | £5,000–£35,000+ | Cabinetry, worktops, appliances, layout changes, trades |
| Bathroom renovation | £4,000–£18,000+ | Fixtures, tiling, plumbing changes, layout, finish level |
These are broad planning ranges only. A fixed quote depends on inspection, the agreed scope, labour rates, materials, access and site condition.
What affects interior renovation cost?
Interior costs are shaped by the size of the area, the quality of the existing surfaces, the finish level and how much work is needed before the final visible finish can be completed.
Room size
Larger floor, wall and ceiling areas increase materials, labour and preparation time.
Surface condition
Damaged walls, uneven floors, cracks, damp marks or poor existing finishes can increase preparation.
Existing material removal
Old flooring, carpet, tiles, cabinets, plaster or wall finishes can add removal and disposal costs.
Finish level
Budget, standard, mid-range and premium finishes can create very different planning ranges.
Trade overlap
Kitchens and bathrooms often involve several trades, while painting, plastering and carpet fitting are usually narrower scopes.
Access and disruption
Parking, stairs, tight rooms, occupied homes and furniture movement can affect labour time.
Regional variation
Interior labour rates vary across the UK, especially in higher-cost regions and London.
Inspection uncertainty
Hidden damage, uneven subfloors, poor plaster, moisture or layout changes may only become clear after inspection.
What may be included or excluded?
Interior quotes can vary because contractors price different scopes in different ways. Use this table to check what may sit inside or outside an interior cost estimate.
| May be included | May be excluded |
|---|---|
| Labour for the agreed interior project scope | Structural work unless specified |
| Standard materials for the selected finish level | Design fees or architectural plans |
| Basic preparation where selected | Regulated electrical, gas or specialist work |
| Old material removal where included | Major plumbing changes unless included |
| Standard flooring, painting, plastering or fitting labour | Hidden damp, rot, asbestos or unsafe materials |
| Basic waste handling where specified | Unexpected remedial work |
| Regional labour adjustment in the estimate | A fixed quote without inspection |
When an interior project needs inspection before quoting
CostIntel can help with early planning, but a fixed quote needs inspection when the condition of the room, floor, walls, ceilings or services may change the scope.
The floor is uneven
Subfloor preparation can change flooring and fitting cost significantly.
Walls or ceilings are damaged
Painting estimates can be inaccurate if plastering, skimming or repair work is needed first.
The kitchen or bathroom layout is changing
Layout changes can affect plumbing, flooring, plastering, electrics and finish work.
Old materials need removing
Tiles, glued flooring, damaged plaster, old carpet or built-in units can add labour.
Moisture or damp is suspected
Interior finishes may need professional assessment before new work is priced.
Access is limited
Stairs, tight rooms, parking restrictions or occupied homes can affect labour time.
How CostIntel estimates interior costs
CostIntel starts with a base planning range for the selected project type, then adjusts the estimate using scope, size, materials, preparation, access, finish level and region. Larger renovation estimates, such as kitchens and bathrooms, also need to account for trade overlap, layout complexity and fixture choices.
Interior cost estimates are designed for early project planning and quote preparation. They help users understand likely cost drivers before speaking with contractors, but they are not fixed quotes.
For more detail, read our methodology, pricing data approach and how costs are calculated.
Interior renovation and plumbing overlap
Kitchen and bathroom renovation costs can overlap with plumbing and drainage when sinks, toilets, showers, baths, washing machines or dishwashers are moved. Interior finish estimates are useful for flooring, painting and plastering, but internal plumbing changes may need a separate planning estimate.
Use the Kitchen Plumbing Cost Calculator when sink relocation, appliance connections or kitchen waste routes may affect the project.
Use the Bathroom Plumbing Cost Calculator when fixture changes, waste routes or soil pipe positions may affect a bathroom renovation.
Compare completed plumbing and drainage calculators
If your interior project already involves plumbing or drainage changes, the completed Plumbing & Drainage Cost cluster can help with early quote preparation. It includes drainage installation, septic tank, bathroom plumbing and kitchen plumbing calculators.
Interior cost calculator FAQs
How much does an interior renovation cost in the UK?
Interior renovation costs vary widely. A smaller painting, plastering, carpet or flooring project may cost hundreds to several thousand pounds, while a kitchen or bathroom renovation can cost much more depending on fixtures, finishes, preparation, layout and trade overlap.
Which interior cost calculator should I use first?
Use the calculator that matches the main project. If you are replacing flooring, start with flooring. If you are repainting, start with painting. If the walls are damaged, check plastering before painting. If the project is a full kitchen or bathroom renovation, use the larger room renovation calculator once it is available.
Why are the Interior Cost calculators marked as coming soon?
The Interior Cost cluster is being built in stages. The hub is created first so the site has a clear category structure before each calculator page is published.
Does CostIntel provide fixed quotes?
No. CostIntel provides planning estimates for early budgeting and quote preparation. A fixed quote needs inspection and confirmation from a relevant contractor or trade professional.
Why do kitchen and bathroom renovation costs vary so much?
Kitchen and bathroom costs vary because they can include fixtures, finishes, flooring, plumbing, layout changes, surface preparation, cabinets, tiling, painting and several trades.
Should plastering be estimated before painting?
Yes, if the wall or ceiling condition is poor. Painting costs can increase when surfaces need skimming, repairs or preparation before decorating.
Is carpet installation the same as general flooring installation?
No. Carpet installation has specific cost drivers such as underlay, grippers, stairs, room shape, joins and old carpet removal.
Does this page provide DIY renovation advice?
No. This page is for cost planning and quote preparation only. It does not provide DIY instructions, regulated work guidance, structural advice or professional installation advice.