Filters
Premium FiltersNew
Reset
mumbai
Search Type
Locality Search
Search along Metro
search
gps
Sector 20
Offer
Property Type
Apartment
Independent House/Villa
Gated Community Villa
Standalone Building
BHK Type
1 RK
1 BHK
2 BHK
3 BHK
4 BHK
4+ BHK
Price Range: ₹ 0 to ₹ 10 Cr
Property Status
Under Construction
Ready
Furnishing
Full
Semi
None
Parking Available
2 Wheeler
4 Wheeler

13 - Flats for Sale in Belapur Mumbai | Apartments for Sale in Belapur Mumbai

Available inventory breakdown:
3 BHK Flat In Sawan Niwas For Sale  In Cbd Belapur
3 BHK Flat In Sawan Niwas For Sale  In Cbd Belapur

3 BHK Flat In Sawan Niwas For Sale In Cbd Belapur

1.70 Cr
16,569/sq.ft
Shahabaj Sector-19 Belapur Navi Mumbai , CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1026 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Shreeji Corner Chs For Sale In Ulwe

1.10 Cr
10,680/sq.ft
Shreeji Corner CHS, ulwe, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
1030 sqft
West
Add notes
Contact Owner

2 BHK Apartment In Shanti Niketan Chs For Sale In Sector 20 Belapur

1.61 Cr
21,296/sq.ft
G-54 Belapur Village, Sector 20, CBD Belapur Navi Mumbai, Maharashtra 400614 India, Sector 20 Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Fully Furnished
756 sqft
East
Add notes
Contact Owner

1 BHK Apartment In Sawan Harmony Chs For Sale In Cbd Belapur

1.10 Cr
14,286/sq.ft
Plot G90 - G95, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
770 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Aries Apartment For Sale In Cbd Belapur

1.60 Cr
15,717/sq.ft
F-8 Shri Mahavir Bhagwan Marg, Sector 20, CBD Belapur, Navi Mumbai, Maharashtra 400614, India, Cbd Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1018 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Lakeview Apartment For Sale In Cbd Belapur

1.30 Cr
18,031/sq.ft
CBD Belapur near Shri Ganesh Mandir, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
721 sqft
Don't Know
Add notes
Contact Owner

2 BHK Flat In Suraj Darshan Chs For Sale In Cbd Belapur

1 Cr
11,364/sq.ft
Suraj Darshan CHS, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
880 sqft
East
Add notes
Contact Owner

3 BHK Apartment In Sawan Niwas For Sale In Cbd Belapur

1.60 Cr
15,579/sq.ft
Shahbaz Village near Palm Beach Hospital, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
1027 sqft
East
Add notes
Contact Owner

2 BHK Flat In Gokul Anand Housing Society Sec 20 Cbd Beapur For Sale In Cbd Belapur

1 Cr
11,891/sq.ft
sector 20, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Fully Furnished
841 sqft
East
Add notes
Contact Owner

2 BHK Flat In Lotus And Tulip Chs For Sale In Cbd Belapur

1.90 Cr
15,833/sq.ft
Sector 20, Near D MART, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1200 sqft
East
Add notes
Contact Owner

1 BHK Flat In Anugruha Chs ,sector 1920,cbd Belapur,navi Mumbai For Sale In Cbd Belapur

1 Cr
16,667/sq.ft
Anugruha Coperative Housing Society, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Mansarovar Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
600 sqft
North-West
Add notes
Contact Owner

1 BHK Apartment In Pinnacle Innovative Sapphiire, Cbd Belapur For Sale In Cbd Belapur

1 Cr
17,094/sq.ft
Nakoda Oil and Ghee shop Building, , CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
585 sqft
West
Add notes
Contact Owner

2 BHK Flat In Shivnandan Apartment For Sale In Cbd Belapur

1.25 Cr
14,269/sq.ft
Shivnandan Apartment, Plot G-18/19, Sector-20., Babulal Panalal Jain Rd, Belapur Village, Sector 20, CBD Belapur, Navi Mumbai, Maharashtra 400614, India, Cbd Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Fully Furnished
876 sqft
South
Add notes
Contact Owner

Showing properties near your searched localities

34 - Flats, Houses for Sale Within 1 Crore to 2.5 Crores in Sector 20, Mumbai | Apartments in Sector 20

3 BHK Flat In Sagar Apartment For Sale  In Cbd Belapur
3 BHK Flat In Sagar Apartment For Sale  In Cbd Belapur

3 BHK Apartment In Sagar Apartment For Sale In Cbd Belapur

2 Cr
18,692/sq.ft
Near MGM Hospital & Research Center - CBD Belapur Navi Mumbai and D Y Patil University School of Management, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1070 sqft
North-West
Add notes
Contact Owner

3 BHK Apartment In Shree Antaraa For Sale In Cbd Belapur

2 Cr
15,385/sq.ft
Near Lotus Pond, Sector 27, CBD Belapur Navi Mumbai, Maharashtra 400614, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Fully Furnished
1300 sqft
South-East
Add notes
Contact Owner

2 BHK Apartment In Adhiraj Gardens, Kharghar For Sale In Kharghar

2.10 Cr
16,601/sq.ft
Sector 5, Kharghar, Navi Mumbai, Mumbai, Maharashtra 410210 , Kharghar, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Fully Furnished
1265 sqft
West
Add notes
Contact Owner

1 BHK Apartment In Pinnacle Innovative Sapphiire For Sale In Cbd Belapur, Navi Mumbai, Maharashtra, India

1 Cr
30,581/sq.ft
CBD Belapur, Mumbai, CBD Belapur, Navi Mumbai, Maharashtra, India, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
327 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Lords Chs For Sale In Bhandup West

1.30 Cr
18,571/sq.ft
Bhandup West, Bhandup, Mumbai, Maharashtra 400078, Bhandup West, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
700 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Krishna Villa For Sale In Belapur

1.50 Cr
17,647/sq.ft
sakaram patil marg near Prachin Amruteshwar, Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Nerul Railway Station (E)
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
850 sqft
North
Add notes
Contact Owner

2 BHK Apartment In Maruti Paradise For Sale In Sector 15

1.75 Cr
14,583/sq.ft
CBD Belapur near Amity International School, Sector 15, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Mansarovar Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1200 sqft
Don't Know
Add notes
Contact Owner

2 BHK Apartment In Neelsidhi Splendour For Sale In Cbd Belapur

2.50 Cr
23,148/sq.ft
sector 15,CBD belapur, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1080 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Sara Antalya For Sale In Belapur

2.20 Cr
16,579/sq.ft
Belapur, Mumbai, India, Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Mansarovar Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
1327 sqft
East
Add notes
Contact Owner

1 BHK Apartment In Punit Tower 2 Chs For Sale In Cbd Belapur

1.15 Cr
17,557/sq.ft
CHS LTD, SHOP NO.17,GR FLR,PUNIT TOWER-2, PLOT NO.53, Sector 11, CBD Belapur,, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Mansarovar Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
655 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Maruti Paradise For Sale In Sector 15 Belapur

1.96 Cr
20,103/sq.ft
Near TVS Ratan Auto Authorised Service Center, Sector 15 Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
975 sqft
West
Add notes
Contact Owner

2 BHK Apartment In Sai Vihar For Sale In Cbd Belapur

2 Cr
20,000/sq.ft
Sector 15, Sai Vihar, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Mansarovar Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Fully Furnished
1000 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Mayuresh Bayview For Sale In Navi Mumbai

2.22 Cr
18,926/sq.ft
Navi Mumbai, Mumbai., Navi Mumbai, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
1173 sqft
East
Add notes
Contact Owner

1 BHK Apartment In Tulip Garden For Sale In Seawoods

1 Cr
13,889/sq.ft
Tulip Garden, Seawoods, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
720 sqft
Don't Know
Add notes
Contact Owner

2 BHK Apartment In Shri Om Sai Chs For Sale In Sector-20

1.60 Cr
13,333/sq.ft
Nerul West,Near Spices Trade India, Sector-20, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1200 sqft
East
Add notes
Contact Owner

2 BHK Flat In Sree Om Sai Chs For Sale In Nerul

1.75 Cr
24,306/sq.ft
Sree Om Sai CHS, Nerul, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
720 sqft
Don't Know
Add notes
Contact Owner

2 BHK Apartment In Shree Om Sai Chs Apartment For Sale In Nerul East Garden

1.70 Cr
17,895/sq.ft
near Presentation conveint school, Nerul East Garden, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
950 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Akshar Alvario For Sale In Seawoods (e)

2.45 Cr
31,410/sq.ft
Plot No.78, Sector 27,, Seawoods (E), mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Unfurnished
780 sqft
North
Add notes
Contact Owner
POSH SOCIETY

2 BHK Apartment In Arenja Tower For Sale In Cbd Belapur

2.50 Cr
22,727/sq.ft
Uttara, Plot no 2, Sector 11, CBD Belapur, Navi Mumbai, near Belapur Railway Station, CBD Belapur , mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1100 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Arenja Tower For Sale In Cbd Belapur

2.50 Cr
23,256/sq.ft
228R+QQ6, Sector 11, CBD Belapur, Navi Mumbai, near Punjab National Bank, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Mansarovar Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1075 sqft
South
Add notes
Contact Owner

3 BHK Apartment In Sagar Apartment For Sale In Cbd Belapur

2 Cr
20,000/sq.ft
MGM Hospital, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Nerul Railway Station (E)
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1000 sqft
North-East
Add notes
Contact Owner

1 BHK Apartment In Punit Tower 1 Chs For Sale In Cbd Belapur

1.20 Cr
18,321/sq.ft
Sector 11, CBD Belapur, Navi Mumbai, Mumbai, Maharashtra 400614, CBD Belapur, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Mansarovar Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
655 sqft
East
Add notes
Contact Owner

2 BHK Apartment In Mahaavir Darpan For Sale In Nerul

2 Cr
17,778/sq.ft
Sector 27, Nerul Navi Mumbai,, Nerul, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Nerul Railway Station (E)
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Semi Furnished
1125 sqft
North-West
Add notes
Contact Owner

1 BHK Flat In Sagar Darshan Housing Society For Sale In Nerul

1.10 Cr
22,000/sq.ft
Nerul East, Sector 27, Nerul, Navi Mumbai, Maharashtra 400706, Nerul, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Sector 11 Kharghar
Fully Furnished
500 sqft
West
Add notes
Contact Owner

2 BHK Apartment In Orion Towers For Sale In Nerul

2.30 Cr
21,905/sq.ft
Orion Towers, New Sector-50, Sector 50, Nerul, Navi Mumbai, Maharashtra 400706, India, Nerul, mumbai
Nearby
ICICI Bank Nerul, Navi Mumbai - Branch & ATM
Bamandongri Railway Station
Yogam Isha Hatha Yoga
Apollo Hospitals
Max Movies
Fully Furnished
1050 sqft
East
Add notes
Contact Owner

Flats & Apartments for Sale in Sector 20, mumbai

Overview (July 2026)

Sector 20 is a residential neighbourhood in mumbai . Browse 52+ NoBroker-verified, owner-direct flat listings from compact 1 BHK to spacious 4 BHK+ apartments.

Available inventory breakdown:

  • 1 BHK: 25+
  • 2 BHK: 15+
  • 1 RK: 8+
  • 3 BHK: 4+

Ready to Move: 48+ | Under Construction: 4+

One-time purchase costs buyers should plan for:

  • Stamp Duty: 6% of property value
  • Registration Charges: 1% of property value

Flat Sale Prices in Sector 20

Avg price per sq ft in Sector 20: ₹22,387. Based on NoBroker-verified listings — July 2026:

  • 1 BHK (350–1,000 sq ft): ₹2,450,000 - ₹10,250,000
  • 2 BHK (500–1,200 sq ft): ₹4,624,999 - ₹32,250,000
  • 1 RK (250–600 sq ft): ₹650,000 - ₹3,900,000
  • 3 BHK (1,026–1,600 sq ft): ₹16,000,000 - ₹42,500,000

Sale Prices by Property Type in Sector 20

Gated Society Apartments for Sale in Sector 20

46+ listings — ₹1,920,000 - ₹33,399,999

  • Pinnacle Innovative Sapphiire
  • mayuresh govindraj apartment
  • Swarasad Apartment

Standalone Buildings for Sale in Sector 20

6+ listings — ₹2,300,000 - ₹6,000,000

Investment Signals for Sector 20

  • Avg Price per Sq Ft: ₹22,387

Nearby Localities for Comparison

Buyers evaluating Sector 20 often compare it with:

  • Sector 29
  • Sector 14
  • Sector 20
  • Sector 15

End-to-End Buying Services by NoBroker

Along with helping you find a verified flat in Sector 20, NoBroker supports buyers through the full purchase journey:

  • Home Loan Assistance: Compare offers from 30+ banks and NBFCs, get pre-approved in 24 hours
  • Legal Verification: Title search, encumbrance certificate, sale deed review by empanelled lawyers
  • Stamp Duty & Registration Support: End-to-end documentation and payment assistance
  • Interior & Renovation: Modular kitchen, painting, electrical, plumbing, carpentry
  • Packers & Movers: Safe, on-time relocation to your new home
  • Property Management: Tenant sourcing and rent collection if buying as investment

Frequently Asked Questions

Are there flats for sale in the Sector 20 without brokerage?

You can find plenty of flats for sale in Sector 20, they come at various price points and configurations, and only on NoBroker they are available with ZERO brokerage fees.

What are the types of flats for sale in Sector 20?

You can choose from fully furnished flats for sale, semi-furnished flats for sale, unfurnished flats for sale. There are also different sizes available and different configurations (1RK, 1BHK-4BHK and more). There are also flats that are ready-to-move, resale, and under construction that are available in Sector 20.

How can I find a flats for sale without brokerage in Sector 20?

The best way to find property that is for sale without any brokerage in Sector 20 is to look on NoBroker! Each house or commercial establishment listed here comes with ZERO brokerage.

Does NoBroker help to buy a flats in the Sector 20?

Yes! NoBroker can help you buy a flat in Sector 20. With NoBroker, you are connected to flat owners, and builders directly. You also get relationship managers who can give you information on societies or buildings to choose based on your unique requirements. Relationship Managers can also give you information on the latest and upcoming projects, and the best deals available that can help you SAVE MONEY. If you need help with negotiation, they help you with that too!

What types of properties are available if I want to buy a house in the Sector 20?

There are many types of properties or houses available for sale in Sector 20 such as resale properties, under construction properties, ready-to-move properties and new projects.

What is the price of flats in Sector 20?

flats prices in Sector 20 are affordable for all classes. Depending on the builder, locality, and BHK configuration, you can easily find a home within your budget.

How do I know if the price of flats in Sector 20 is quoted correctly?

Identify the fair market value of the flats in Sector 20 by estimating and comparing a flat’s price online. Next, try identifying the per square feet rate in Sector 20(this usually differs from one property to another based on location, infrastructure, amenities, transportation, and other factors).

How can I estimate the price of flats in Sector 20?

You can estimate the price of flats in Sector 20 by looking at the builders’ reputation, the flat resale price, the location value, amenities, construction quality, stamp duty and registration charges, brokerage fee, and other additional costs.

What is the price range of houses in Sector 20?

The average price range of a house in Sector 20 , Mumbai is affordable for all classes and, you can easily find a home within your budget.

What is the price range of villas in Sector 20?

The average price range of a villa in Sector 20 , Mumbai is affordable for all classes and, you can easily find a home within your budget.

How do I know if the price of a house in Sector 20 is quoted correctly?

Identify the fair market value of a house in Sector 20 by estimating and comparing its price online. Next, try identifying the per square feet rate in Sector 20. Use this knowledge to evaluate whether your builder is charging you adequately.

How do I know if the price of a villa in Sector 20 is quoted correctly?

Identify the fair market value of a house in Sector 20 by estimating and comparing its price online. Next, try identifying the per square feet rate in Sector 20. Use this knowledge to evaluate whether your builder is charging you adequately.