Balcony renovation: compare quotes and prices

Which parts of the balcony need renovation?

Work may involve the floor covering, waterproofing, load-bearing structure, railing or underside. Timber and metal balconies are included too. A coating quote does not automatically describe the entire project.

For damaged concrete, establish what needs repair and protection. Timber or metal construction may instead involve components, connections and their condition. Repainting is not equivalent to repairing a damaged support.

State the main objective. For several balconies, number, approximate area and known differences help. The contractor can propose the technical solution after assessment.

Describe visible damage and have its cause assessed

Cracks, spalling, rust marks, loose tiles and damp areas can have different causes. Water remaining after rain also matters. Say where the problem is visible and whether there is moisture below or on the building.

Exposed metal, detached components or a loose railing require professional assessment. Appearance alone cannot establish load-bearing capacity. Painting or covering does not automatically resolve a structural cause.

The contractor should examine existing conditions and necessary scope before repair. Agree how damage discovered after removing old layers will be handled. Necessary material assessments before disturbing older construction belong in preparation too.

Covering, waterproofing and drainage perform different jobs

The visible finish is not the waterproofing layer in every construction. Tiles, timber grids and decorative coatings may need additional layers. The appropriate combination depends on the substrate, use and proposed system.

Water needs suitable drainage. Falls, outlets, edges and building connections work together. A waterproof surface helps little if water enters at an unsuitable threshold or junction.

Ask how doors, wall connections, movement joints and railing fixings will be integrated. An additional bead of sealant is not a universal solution for every connection problem.

Consider what is below and the finished heights

An exposed cantilevered balcony differs from a surface above an enclosed room. The latter may need additional roof-construction and building-physics planning. Say what is below the surface if you know.

A higher new covering changes door connections, thresholds and effective railing height. Simply laying tiles over the existing construction is not automatically suitable. Available height, loads and connection details need assessment together.

Easier access should be planned with drainage and weather protection. A low threshold should not be considered in isolation. Coordinate planned facade or balcony-door work too.

Railings need a protective function and sound fixings

Cleaning or painting, local repair and replacement differ. Material, length and fixing condition affect the work. For a railing-only project, give its approximate length; floor area would be the wrong measurement.

A railing protects against falling. Geometry, fixings and use therefore need assessment, particularly when components change or the floor becomes higher. Applicable requirements should be clarified for the actual project.

Ask how fixings and penetrations will be protected against water. Railing and waterproofing work should be coordinated so that a later intervention does not damage the renewed construction.

What determines balcony renovation costs?

A simple covering renewal, new waterproofing and structural repair are not directly comparable. Published flat amounts often omit preparation, edge connections, access or condition. They do not establish a reliable Swiss average for every balcony.

A geometric example shows the scope: a rectangular balcony measuring 5 × 2 m has 10 m² of area and a 14 m perimeter. If one 5 m side meets the facade, 9 m of free edges remain. Identical areas can still need very different connections and repairs.

Compare separate items and the complete final amount. Clarify which work is measured by area, length, item or time. For unresolved damage, an agreed process is more useful than an apparently complete price with vague exclusions.

Plan weather, access and disruption

Substrate condition and weather affect application. Rain resistance, drying and full use are different stages. Agree suitable conditions and protection rather than a universal promise that every coating can be used within a few hours.

Material transport and work on edges or undersides depend on storey height, access and appropriate equipment. The contractor determines whether scaffolding or another solution is needed. Give the storey precisely to help plan this work.

For several balconies, coordinate stages with occupancy. Clarify when balcony doors can be opened and when the covering, railing and drainage are ready for use.

1. Assessment. Clarify damage, construction and planned scope.
2. Preparation. Secure access, open the existing construction and complete necessary repairs.
3. Construction. Coordinate waterproofing, connections, covering and other work.
4. Release. Hand over the result and its care instructions.

Handover and maintenance belong in the project

Check results against the agreed specification. Ask to see drainage, connections and maintenance access. Documentation of concealed details helps with future work. Record outstanding points and dates.

Keep outlets accessible and follow the covering or coating care instructions. New holes, furniture fixings or later railing work should suit the completed construction. Have unusual conditions assessed before simply hiding them.