01
Surface condition
The condition selector applies a broad allowance. It cannot inspect a wall or work out exactly which repairs and preparation will be needed.
Plan your plastering budget
Plastering Cost Calculator London
How much should you allow for the plastering? Enter your measurements to explore a budget range for walls, ceilings, repairs or K Rend silicone rendering. The result is a starting point for a quotation, with the calculation explained below.
Free quotationNo obligationLondon pricing
London plastering price & quote calculator
Measure the job. See the breakdown. Share the estimate.
Enter the room and job details below. Your estimate updates instantly and can be saved as PDF, emailed or shared on WhatsApp.
Transparent pricing
Why the quotation may differ from this estimate
02
Type of finish
The wall options use different rate ranges. Ceiling boarding and other specialist finishes are outside this calculator’s scope. K Rend silicone render is included as an indicative external-wall option.
03
Room complexity
Stair access and room clearance are included as selectable allowances. Doors and windows are treated as additional detail work rather than deducted from the wall area; unusual arches, very deep reveals and other bespoke details still need a site quotation.
Guide rates
The rates behind your result
These are guide rates built into this calculator. The plastering rates are retained from the supplied price model; the K Rend silicone range is an indicative UK supply-and-fit allowance that includes both labour and standard materials, and is not a confirmed price for your property. Condition allowances are applied on top.
| Service | Calculator base rate | Best for |
|---|---|---|
| Wall skimming | £10 – £25 / m² | Refreshing sound existing plaster |
| Full re-plastering | £20 – £45 / m² | Damaged or unsuitable existing plaster |
| Small plaster repairs | £14 – £24 / m²; £150 minimum | Cracks, holes and local damage |
| Ceiling add-on | £15 – £35 / m² | Ceiling skim only; boarding excluded |
Check the maths
What the example at the top includes
A 4.5 m × 3.5 m room with 2.5 m walls has 40 m² of gross wall area. For labour budgeting, the door and window are not automatically deducted because their reveals, beads, edges and corners still require detailed finishing.
At £10 – £25 per m² for skimming, the 40 m² gross wall area is kept in full. The worked example then applies the 12% average-condition allowance, the default access/protection allowance and a separate standard detail allowance for one door and one window. Rounded to whole pounds, that gives £555 – £1,340. The ceiling is not included in this example.
Use the figures to explore a budget, then send photos and measurements for a project-specific plastering quotation. Read about skimming if you’re unsure which service to select.
Understanding your estimate
Measurements, allowances and limits
Should I enter floor area or wall area?
For whole-room internal plastering, enter length, width and wall height. The calculator works out the four walls as 2 × (length + width) × height. For K Rend silicone render, enter the external wall width and height; the calculator prices that single façade as width × height. A ceiling, if selected, uses room length × width. For repairs, enter the combined area of the damaged patches.
How are doors and windows priced?
Doors and windows are not deducted from the chargeable wall area. Working around openings can take longer than working across a straight wall because of reveals, beads, corners and edge finishing. The calculator therefore keeps the full gross wall area and adds a separate detail allowance based on the number and complexity of openings. Local repair areas are priced from the repair area entered.
What does the condition setting change?
Good condition leaves the base rates unchanged. Average adds 12% and poor adds 25% to both wall and ceiling calculations. These broad allowances do not confirm that a surface is suitable for the selected service.
Why does a small repair still show at least £150?
The supplied price model includes a minimum allowance for wall repairs. This is applied after the repair area and condition calculation, before adding any ceiling estimate. It is a budgeting assumption and must be confirmed in a quotation.
Does the result include materials and VAT?
The rates are used as combined guide allowances for the selected work; there is no separate materials surcharge in the calculation. An accurate materials breakdown and VAT treatment were not specified in the supplied model. Confirm these, preparation, protection and waste removal when requesting a quote.
Can I use this for a single wall or an irregular room?
For internal room services, the room calculation assumes four rectangular walls and is not designed for a single internal wall, sloping ceilings or an irregular layout. K Rend is different: it is specifically calculated as one external wall using wall width × wall height. Send measurements or a sketch for more complex façades.
Will the calculator tell me how long the job takes?
No. Area alone is not enough to predict the time needed. Preparation, access, the chosen work and the number of visits can affect the programme. Ask about time on site and drying separately when arranging the job.
Turn your estimate into a project enquiry
Share your measurements, postcode and photos of the surfaces. Include any details this calculator cannot cover, such as access or repairs, when asking for your free quotation.
Use the estimate as a budget, not a specification
Measurements
The tool uses the dimensions you enter. Irregular rooms, stairwells and detailed areas may need a manual take-off.
Condition
A condition allowance cannot confirm whether a wall is actually suitable for skimming or needs wider repair.
Final quote
Photos and an assessment are needed to confirm preparation, access, materials and the final project price.