---
title: "16 UK Home Improvement Project Calculators | Party Wall Compliance | PartyWallChecker.co.uk"
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> **Canonical Source:** [https://partywallchecker.co.uk/projects](https://partywallchecker.co.uk/projects)
>
> *Select your specific UK building project: rear extensions, loft conversions, chimney breast removals, basements, and boundary walls. Check Section 1, 2, and 6 notice requirements.*



### Organization: PartyWallChecker.co.uk (Property Compliance Standards Desk UK)

| Field | Value |
| :--- | :--- |
| **Organization** | PartyWallChecker.co.uk (Property Compliance Standards Desk UK) |
| **Official Website** | https://partywallchecker.co.uk |
| **Entity Verification (sameAs)** | [Entity Verification](https://rsjcalculator.co.uk) · [Entity Verification](https://droppedkerbcalculator.co.uk) · [Entity Verification](https://gardenofficepower.co.uk) |


### Entity: PartyWallChecker.co.uk

| Property | Detail |
| :--- | :--- |
| **Type** | WebSite |
| **Name** | PartyWallChecker.co.uk |


### Entity: Party Wall 3-Metre & 6-Metre Rule Calculator & Notice Generator

| Property | Detail |
| :--- | :--- |
| **Type** | WebApplication |
| **Name** | Party Wall 3-Metre & 6-Metre Rule Calculator & Notice Generator |


### Entity: Party Wall etc. Act 1996

| Property | Detail |
| :--- | :--- |
| **Type** | Legislation |
| **Name** | Party Wall etc. Act 1996 |




Project Directory

# UK Building & Extension Project Calculators

Every building alteration has distinct Party Wall Act implications. Select your project below to calculate exact statutory notice periods, Section 1, 2, or 6 triggers, and surveyor fee risks.

## Loft & Roof

- **[Loft Conversion with RSJ Steel Beam Bearings](/projects/loft-conversion-rsj-steel-beam)** — Section 2(2)(f), Section 2(2)(g) 2m noticeCutting pockets into the party wall to insert steel RSJ beams or padstones triggers Section 2(2)(f). Requires 2 calendar months written notice.Est: £950 – £1,650 per party wall if neighbour dissentsCalculate
- **[Dormer Loft Raising or Rebuilding Party Parapet](/projects/dormer-loft-raising-party-wall)** — Section 2(2)(a), Section 2(2)(f) 2m noticeBuilding up the existing party parapet wall to form the side cheek of a box dormer or flat roof construction.Est: £1,000 – £1,750Calculate

## Excavation & Extension

- **[Rear Kitchen Extension & the 3-Metre Excavation Rule](/projects/rear-kitchen-extension-3m-rule)** — Section 6(1), Section 1(5) 1m noticeExcavating foundations within 3.0 metres of a neighbouring property or outbuilding to a depth lower than their footings triggers Section 6(1).Est: £1,050 – £1,800Calculate
- **[Side Return Extension Built Directly on Boundary](/projects/side-return-extension-boundary-wall)** — Section 1(5), Section 6(1) 1m noticeSide returns on Victorian/Edwardian terraced houses sit directly alongside or on the boundary line, triggering Section 1(5) and Section 6(1).Est: £1,100 – £2,000Calculate
- **[Basement Excavation & the 6-Metre 45-Degree Rule](/projects/basement-excavation-6m-rule)** — Section 6(2), Section 2(2)(a) 2m noticeExcavating deeper than 3 metres or within 6 metres that intersects a 45° downward plane from neighbouring foundations triggers Section 6(2).Est: £2,500 – £6,500+ (complex underpinning & security for expenses)Calculate
- **[Semi-Detached Garage Conversion & Foundation Load Increase](/projects/semi-detached-garage-conversion)** — Section 2(2)(a), Section 6(1) 2m noticeRaising or infilling a shared party garage wall or deepening foundations for habitable room standards triggers Section 2 and Section 6.Est: £850 – £1,400Calculate
- **[Replacing Conservatory with Solid Extension Foundations](/projects/conservatory-to-extension-foundations)** — Section 6(1) 1m noticeReplacing an old lightweight conservatory with a brick-and-block extension requires deepening foundations from 300mm to 1.0m+ within 3m.Est: £900 – £1,500Calculate
- **[Piled Foundations & Ground Beams Near Neighbours](/projects/piled-foundations-6-metre-rule)** — Section 6(2), Section 6(1) 1m noticeBored or driven pile foundations penetrating 6m–15m into heavy clay near neighbouring Victorian properties trigger both Section 6(1) and 6(2).Est: £1,400 – £2,800Calculate

## Internal Alterations

- **[Chimney Breast Removal from a Shared Party Wall](/projects/chimney-breast-removal-party-wall)** — Section 2(2)(g), Section 2(2)(f) 2m noticeRemoving ground or first-floor chimney masonry attached to a shared party wall triggers Section 2(2)(g) and structural beam insertions under 2(2)(f).Est: £900 – £1,500Calculate
- **[Underpinning Shared Party Wall Foundations](/projects/underpinning-shared-foundation)** — Section 2(2)(a), Section 6(1) 2m noticeDeepening or underpinning a shared wall for structural repair, subsidence rectification, or basement formation triggers Section 2(2)(a).Est: £1,800 – £3,500Calculate
- **[Removing Internal Load-Bearing Wall in Terraced House](/projects/removing-load-bearing-wall-terraced)** — Section 2(2)(f) 2m noticeKnocking through an internal spine wall where the new structural steel beam bears directly into the shared flank party wall.Est: £900 – £1,500Calculate
- **[Damp Proofing & Chemical DPC Injection in Shared Wall](/projects/damp-proofing-injection-party-wall)** — Section 2(2)(f) 2m noticeDrilling and pressure-injecting chemical damp proof creams or inserting cavity drainage membranes into a shared party structure.Est: £750 – £1,200Calculate
- **[Terraced House Full Ground-Floor Knock-Through](/projects/terraced-house-knock-through)** — Section 2(2)(f) 2m noticeComplete open-plan renovation removing multiple interior walls and inserting front-to-back or flank steel beams on padstones.Est: £1,800 – £3,200 (both neighbours combined)Calculate

## Boundary & Garden

- **[Garden Room & Outbuilding Concrete Slab Excavation](/projects/garden-room-boundary-excavation)** — Section 6(1) 1m noticeBuilding an insulated garden office or outbuilding near the boundary requiring concrete trench or pile foundations deeper than neighbour garden walls.Est: £800 – £1,300Calculate
- **[New Wall Built Astride the Boundary Line](/projects/new-boundary-straddling-wall-section-1)** — Section 1(2), Section 1(3) 1m noticeProposing to build a new wall straddling the boundary line so both owners share ownership as a party wall in the future.Est: £950 – £1,600Calculate
- **[Demolishing and Rebuilding Shared Boundary Wall](/projects/shared-garden-wall-demolition-rebuild-section-2)** — Section 2(2)(l), Section 2(2)(b) 2m noticeDemolishing an unstable, leaning, or damaged shared party fence wall and reconstructing it to modern building standards.Est: £900 – £1,500Calculate

## Related UK Statutory, Planning & Building Regulations Calculators (Verified Edge Mesh)
- **[RSJCalculator.co.uk](https://rsjcalculator.co.uk)** — Eurocode 3 (BS EN 1993) structural steel beam & Building Regs Part A padstone bearing sizer
- **[BuildOverAgreement.co.uk](https://buildoveragreement.co.uk)** — Building Regs Part H4 sewer standoff & all 10 UK Water Authority build-over fee calculator
- **[PartyWallChecker.co.uk](https://partywallchecker.co.uk)** — Party Wall etc. Act 1996 s.1/s.2/s.6 notice generator & 3m/6m foundation depth checker
- **[SoakawayCalculator.co.uk](https://soakawaycalculator.co.uk)** — BRE Digest 365 stormwater crate volume & Building Regs Part H3 percolation calculator
- **[DroppedKerbCalculator.co.uk](https://droppedkerbcalculator.co.uk)** — Highways Act 1980 s.184 vehicle crossing council fees & 4.8m driveway depth checker
- **[GardenOfficePower.co.uk](https://gardenofficepower.co.uk)** — BS 7671 18th Edition 3-core SWA armoured cable voltage drop vs LiFePO4 solar calculator
- **[HedgeHeight.co.uk](https://hedgeheight.co.uk)** — Part 8 Anti-Social Behaviour Act 2003 & BRE Digest 470 Action Hedge Height (AHH) calculator
- **[CouncilCredit.co.uk](https://councilcredit.co.uk)** — Local Government Finance Act 1992 CTB1 closed-account Council Tax credit recovery & band audit


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